Tiwi language
Tiwi is an Australian Aboriginal language spoken by the Tiwi people on the Tiwi Islands, within sight of the coast of northern Australia. It is one of about 10% of Australian languages still being learned by children.
Traditional Tiwi, spoken by people over the age of fifty by 2005, is a polysynthetic language. However, this grammatical complexity has been lost among younger generations. Tiwi has around one hundred nominals that can be incorporated into verbs, most of them quite different from the corresponding free forms.
Tiwi has long been regarded as a language isolate.
Phonology
Consonants
Like most Australian languages, Tiwi has four phonetically distinct series of coronal stops. There are contrasting alveolar and postalveolar apical consonants, the latter often called retroflex. However, the two laminal series are in complementary distribution, with postalveolar laminal occurring before the front vowel, and denti-alveolar laminal occurring before the non-front vowels,. That is, phonologically Tiwi has at most three series. However, some analyses treat postalveolar as a sequence, since it only occurs in medial position.In addition, Tiwi has a velar approximant, which is somewhat unusual for an Australian language. Typically for an Australian language, there are no fricatives.
Tiwi allows consonant clusters in medial position. Besides the possibility of for, these include other liquid-stop clusters and nasal-stop clusters such as. However, there is little reason to choose between an analysis of as being a cluster as opposed to a prenasalized stop.
There is also a glottal stop in the inventory of speech sounds in Tiwi, but as Osborne notes, it functions to mark the end of a sentence and as such, is best analysed as a part of Tiwi prosody.
Vowels
Tiwi has four phonemic vowels.| Front | Central | Back | |
| Close | i | u | |
| Open | a | o |
The frequency of the open-back vowel is relatively low. It is neutralised with following, and does not occur initially or finally. However minimal pairs exist, albeit few in number, to prove its existence as a distinct phoneme:
Each phonemic vowel exhibits a broad range of allophones, many of which overlap with allophones of other vowels, and three vowels reduce to in many unstressed syllables. All vowels are phonemically short, while long vowels occur when medial glides are reduced. For example:
Morphology
Tiwi is characterized by its highly complex verb morphology. Tiwi is a polysynthetic language with a heavy use of noun incorporation such that all elements of a sentence may be expressed in a single morphological and phonological word as in the following example.Around one hundred nominals may be incorporated into the verb in Tiwi, but the incorporated forms often differ significantly from the corresponding free forms, or their closest semantic correspondent as illustrated below.
| Incorporated form | Free form | Gloss |
| -maŋu- | kukuni | 'fresh water' |
| -ki- | yikwani | 'fire' |
| -kəri- | yikara | 'hand' |
Dixon suggests that while some forms have merely undergone phonological reduction as a result of being grammaticalized, others bear no phonological resemblance to their corresponding free form due to lexical replacement and taboo.
Verb morphology
Osborne identifies eleven grammatical categories that can be marked on verbs. They are listed below using his terminology. All verbs must be marked for tense, person and number, and third person-singular subjects and objects are also obligatorily marked for gender. All other categories listed below are not grammatically obligatory.| Category | Description |
| Person | Performer and/or undergoer of the event with respect to the speaker and hearer. |
| Number | Either Singular or Plural. |
| Gender | Either Masculine or Feminine. |
| Tense | Either Past, Non-past or Future. |
| Aspect | There are five aspects in addition to the unmarked: durative, repetitive, moving, beginning and inceptive. |
| Mood | The moods are an unmarked indicative, imperative, subjunctive, compulsional and incompletive. |
| Voice | The voices are reflexive, reciprocal, collective and causative. |
| Location/direction | The marked location is 'at a distance' or, when marked on a motion verb, 'from a distance'. |
| Time of day | The times of day that can be marked are either early morning or evening. |
| Stance | Verbs can take stance markers to indicate whether the event was carried out while standing or while walking along. |
| Emphasis | Verbs in the imperative mood can additionally take emphasis. |
The terminology Osborne uses for the grammatical categories, in particular the aspects and voices, does not conform to more recent cross-linguistic standards. For instance, Osborne glosses verbs containing the beginning aspect as started to, which closer aligns to what is now called the inceptive or inchoative, while the aspect that Osborne calls inceptive is glossed as about to, which is more reminiscent of the prospective.
Nominal morphology
Tiwi, like many Indigenous Australian languages, does not distinguish between nouns and adjectives. Both things and properties or qualities of those things are encoded by the nominal word class. Nominals in Tiwi are marked for gender and number. However, the plural is ungendered, resulting in three categories: masculine, feminine and plural.Gender
Gender is sexually assigned for humans and animals, but semantically assigned for inanimate objects on the basis of shape. Things that are thin, small and straight are assigned to the masculine gender, and objects that are large round and ample are assigned to the feminine. As a result, nominals in Tiwi may take either gender depending on the context and reference. Grass, for instance, is masculine when referring to a blade of grass, but feminine when referring to a patch or expanse of grass.Masculine nominals are marked either by the suffix -ni or -ti, and feminine nominals by -ŋa or -ka. Furthermore, many nominals are implicitly masculine or feminine and lack overt marking. However, as nominals denoting properties always take regular gender suffixes that agree with the object they modify, the covert gender of these nominals can be ascertained.
The table below from Osborne lists the suffixes marking each gender as well as their rate of occurrence among 200 tokens from each class.
| Masculine | Feminine |
| -ni | -ŋa |
| -ti | -ka |
| -ø | -ø |
Number
Nominals in Tiwi can be marked for plural either by a plural suffix -wi or -pi. The plural suffix fills the same morpheme slot as gender suffixes and as a result, plurals do not contrast for gender. Some nominals undergo partial reduplication of the stem when pluralised. The form of the reduplicant is always Ca-, thus muruntani 'white man' and muruntaka 'white woman' pluralise to mamuruntawi 'white people'.Human and Non-human
Osborne also identifies a distinction among Tiwi nominals as to whether they belong to a Human class or a Non-human class. However the category is covert on nominals themselves, and is only marked on numerals.| Human | Masculine Non-human | Feminine Non-human | |
| two | juraɻa | jiraɻa | jin̪t̪aɻa |
| three | jurat̪ərima | jirat̪ərima | t̪at̪ərima |
Modern Tiwi
Since contact with Europeans, Tiwi has been undergoing changes to its structure that have resulted in a modern version of the language that is quite typologically distinct from Traditional Tiwi. These changes have affected the verb morphology and lexicon of Tiwi, resulting in a language that is relatively isolating, compared with its polysynthetic predecessor.Contact with English has also resulted in a number of other varieties of Tiwi, such as Children's Tiwi and Tiwi-English, in which Tiwi people have varying levels of proficiency. In 1993, Traditional Tiwi was spoken only by people over 55, with Modern Tiwi being spoken by everyone up until the age of 30.
The main change that separates Traditional and Modern Tiwi is the level of complexity in the verb. Traditional Tiwi is a polysynthetic language while Modern Tiwi is isolating, with some inflection. The examples below show the difference between a sentence rendered in Traditional Tiwi and Modern Tiwi.