Determine whether the given word is a prefix, suffix, or root word.

ive

Prefix

Suffix

Root

uni

Prefix

Suffix

Root

arch

Prefix

Suffix

Root

auto

Prefix

Suffix

Root

ist

Prefix

Suffix

Root

Prefix (ist can be a suffix or root word, but in this case it is most commonly used as a prefix).

ive - Suffix

uni - Prefix

arch - Prefix

auto - Prefix

ist - Suffix