What is the meaning of Si-?

the direct object of an active transitive verb

the subject of a stative intransitive verb

indicates possession of a noun

First-person plural inclusive subject marker for tense modifying adverbs.

we; first-person plural subject concord.

us; first-person plural object concord.

he, she, it; class 7 subject concord.

him, her, it; class 7 object concord.

we; first-person plural subject concord.

us; first-person plural object concord.

Class 7 noun prefix.

he, she, it; class 7 subject concord.

him, her, it; class 7 object concord.

we; first-person plural subject concord.

us; first-person plural object concord.

he, she, it; class 7 subject concord.

him, her, it; class 7 object concord.

we; first-person plural subject concord.

us; first-person plural object concord.

Class 7 noun prefix.

he, she, it; class 7 subject concord.

him, her, it; class 7 object concord.

applicative prefix

to drain

to drain

my, me

I do not, 1st person singular negative subject concord

the negative emphatic copula or negative focusing copula: expresses "it is not" with an inflected object

we; first-person plural subject concord.

us; first-person plural object concord.

he, she, it; class 7 subject concord.

him, her, it; class 7 object concord.

we; first-person plural subject concord.

us; first-person plural object concord.

Class 7 simple noun prefix.

he, she, it; class 7 subject concord.

him, her, it; class 7 object concord.

Source: wiktionary.org