Answer:

Impossible

Root Word: possible

Prefix: Im

Suffix: none

Meaning: It is something that cannot be done, that cannot be true, or it also is something or someone who is hard to deal with.

Disagree

Root Word: agree

Prefix: Dis

Suffix: none

Meaning: When you do not believe that a statement is true.

Homeless

Root Word: Home

Prefix: none

Suffix: less

Meaning: Without a home, and therefore typically living on the streets.