kwanza (verbal noun of the ku class)
1) Infinitive of -anza
The form -a kwanza, which literally means "of the beginning" is used for first. See Appendix:Swahili numbers for more.
Ordinals are formed by using -a (“of”), which must agree using the verb prefixes with the class of the noun preceding it, followed by the number in question. The two exceptions are -a kwenda (“first”) (kwenda is the infinitive/gerund of -enda (“to begin”)) and -a pili (“second”), which uses the counting form.