Leha is a nominative-accusative direct-inverse language with a 2 > 1 > 3, named > unnamed, human / god / force of nature > non-human animate > inanimate, and topical > non-topical person/animacy/topicality hierarchy.
Leha has a topic-comment word order, with the topic coming first followed by the comment, which may include either the subject or the direct object, along with the indirect object and any oblique arguments.
Within the comment the verb complex comes first, followed by the subject or direct object, followed by the indirect object, followed by any oblique objects.
The verb complex consists of:
- The verb stem
- The applicative voice marker (-(a)t)
- The causative voice marker (-hi)
- The reflexive voice marker (-le)
- The passive voice marker (-da)
- The negative marker (-(o)w)
Any modal marker (ability -law, possibility -(a)y, requirement -(i)k, obligation -ca)
- The negative marker, for modals (-(o)w)
- The prohibitive marker (-(i)lu)
- Any tense/aspect marker (past perfective -na, past imperfective -(e)r, future -(a)w)
- Number agreement (plural subject -(i)n, plural direct object -te, plural both -he)
- Any evidential marker (egophoric -ye, direct knowledge -jo, reportative -hu, deductive -(i)m, dubitative -zi, assumption -(o)b)
- 1st person agreement (-tu)
- 2nd person agreement (-ya)
- Duplicate person agreement (-re)
- The inverse marker (-(w)i)
- The attributive marker (-(n)e)
Note that a verb agrees simultaneously with its subject and its direct object, but does not distinguish which it is agreeing with; the plural marker is marked if either argument is plural, and both the 1st and the 2nd person markers may mark if either argument is 1st or 2nd person. The duplicate person marker marks if both the subject and direct object are either 1st or 2nd person; note that it is not used for 3rd person arguments.
Nouns have the following morphology:
- The noun stem
- The plural marker (-(r)i)
- The plural possessor marker (-(a)d)
- Any possessor person marker (1st -(u)h, 2nd -(a)ya, 3rd -(a)n)
There are the following independent pronouns:
| Singular | Plural |
1st | naxa | lige |
2nd | toovi | jeh |
3rd | wa | muun |
There are the following relational nouns:
Top | xoom |
Bottom | yeh |
Front | rab |
Back | mika |
Inside | paha |
Outside | riin |
Surface | lun |
Above | fikka |
Below | weet |
In front | hewa |
In back | pol |
Possessors follow possessees, and attributive relative clauses follow the nouns they qualify.