What is the prefix of “perennial”?

per
pere
ial
peren

per

The suffix -less in the words "helpless" and "careless" means ___________.

most
tiny
some
without

without

What is the prefix of “interact”?

in
inter
er
act

inter

The prefix of "perennial" is "peren".

The prefix of "perennial" is "per." To determine the prefix of a word, you can break it down by separating the root word from any additional parts. In this case, the root word is "ennial," and the prefix is "per."