Question: does anybody know if the words "to know" and "sun" are related? Thanks
nope, just homonyms (vitate)
According to wiktionary jua is either n-n class or ji-ma class, therefore jua ya ausbuhi should work as well, shouldn't it?
See https://en.wiktionary.org/wiki/jua#Swahili : jua (n class, plural jua) or jua (ma class, plural majua)
In this course jua is always in the noun class ji-ma