Nouns inflect to denote plurality and possession. The plural is indicated by the suffix *-r. When the plural suffix is added to a noun ending in a consonant, said consonant is elided, and the preceding vowel lengthened in compensation. There is also a dual form using the suffix *-n (which has the same effect on a consonant final root), which is most commonly used for objects which typically appear in pairs (e.g. hands).
Examples of plurals:
*katu ‘star’ > *katur ‘stars’
*ŋāmak ‘person’ > *ŋāmār ‘people’
*gʷaciw ‘hand’ > *gʷacīn ‘hands’
*ɲūsa ‘eye’ > *ɲūsan ‘eyes’
Possession is marked by a personal prefix, along with a suffix if the possessor is plural (or dual).
The possessive prefixes are the following:
1st person singular: ni-
1st person plural inclusive: ŋu-
1st person plural exclusive: si-
2nd person: lu-
3rd person animate: mi-
3rd person inanimate: a-
If the possessor is plural (including in the case of the 1st person where there are separate plural prefixes), the suffix –mī must be added to the noun.
Examples (using *gʷaciw ‘hand’):
nigʷaciw ‘my hand’
ŋugʷacīrmī/sigʷacīrmī ‘our hands’
migʷaciw ‘his/her hand’
migʷacīrmī ‘their hands’
Several daughter branches subsequently developed further affixes by fusing clitics with nominal stems. In Kantaranyan, for example, several specifiers and postpositions eventually developed into further nominal affixes.
Verbs inflect for aspect and voice, using the following affixes:
The perfective and anterior affixes are suffixed to consonant final stems, and infixed before the final vowel of vowel final stems (compare, for example *imik agi wəɟija ‘he ate it’ with *imik agi gʷālanī ‘he drank it’). The imperfective inverse, passive and antipassive suffixes follow the same morphonological rules as the nominal plural and dual suffixes (compare, for example *niq wəɟat ‘I am eating’ with *niq gʷālāt ‘I am drinking’).
The direct form is the basic form of the verb, and the only form available for intransitive verbs. The other voices are used as follows:
-the inverse form is used to signal that the subject is lower in the animacy hierarchy than the object.
-the passive is used in order to allow the subject to be omitted (e.g. *agi cakʷīra ‘it broke’ vs. *niq agi cakʷija ‘I broke it’)
-the antipassive is used to allow the object to be omitted (e.g. *mīr wəɟat ‘they are eating’ vs. *mīr piwla wəɟa ‘they are eating fruit’).
(Hopefully that's all clear enough)