Where does “kulayirana” come from?

kulayirana (Tumbuka) comes from Tumbuka layirana, from Tumbuka -ana, from Proto-Bantu -ana.

Ancestry of “kulayirana”, step by step

StepLanguageWordMeaning
1Tumbukalayirana—
2Tumbuka-anareciprocal suffix, each other
3Proto-Bantu-ana—
Every word from Proto-Bantu -ana →Every word from Tumbuka -ana →Every word from Tumbuka layirana →