pack
group
DAR
Bouquet
club
Ennead.
Arrange, analyze
Club
A prefix is a letter or group of letters added to the beginning of a word to change its meaning.
The word you're looking for is "family." It fits all your criteria, and it's a pretty common word for a group of people. So, there you go, hope that helps!
bunch, batch, clump, range, field, width........:)
It would be either a prefix or a suffix. Prefix means the letters before, and suffix means the letters after the word.
The 3 letter word for a group of kangaroos is mob.