Sinu

Etymology
It has 3 meanings:
 * Male offspring.
 * Younger male in relation to the speaker.
 * Lower ranked man in a all-male religious community in relation to the higher ranked man.

Derived words

 * alsinu (n), meaning son-in-law.
 * dewsinu (n), meaning godson.
 * -sinu (suffix), suffix for male Keltsvian patronymic surnames.
 * upsinu (n), meaning grandson.
 * upupsinu (n), meaning great-grandson.