But density is not weight. Is it?

Etymology (uzito)

From u- + -zito.

Noun

uzito (u class, no plural)

1) weight

From Wiktionary

Example sentence:

Pima uzito wa mtoto

TRANSLATION

Weigh the baby

https://www.duolingo.com/dictionary/Swahili/uzito/91f08e3abcfa091c9d443acb31c28252

am a native Swahili speaker and we use it too to mean heaviness. please correct.

What would Kizito be then? Have read that quite often