What is the meaning of Da-?

deca- (“×10”); Alternative form of dk- (“deka-”)

orifice, mouth, opening of a container

entering, going through a doorway

closing of an opening

opening

With the d-qualifier: verbally; oral noise, speech

A thematic prefix appearing in two verb themes relating to death.

don't!

up, ascending

at an elevation

With a following d-qualifier: hanging up

With a preceding pronomial prefix and -kʼe: upon, mounting

With optional preceding ko- and mandatory following d- and i-: down, descending

With preceding ti-: wrongly, badly, forbodingly, ominously

With preceding ł-: for a long time

nearby

With the d-qualifier: scattering, cluttering

With the d-qualifier: escaping

third person plural nominative proclitic

thus

her (object pronoun)

them

question marker

third-person singular possessive prefix, its

indicates definiteness

joins stative verbs attributively

third-person plural clitic, they

third-person singular clitic, he, she

prefix form of da, meaning there-

Thematic prefix, referring to death.

Distributive plural marker, indicating that three or more subjects, objects or events are involved individually in the action denoted by the verb. In addition to verbs, it may also pluralize postpositions.

Forms the distributive plural of nouns and pronouns equivalent to "many"

Source: wiktionary.org