Friendlier or more friendly are the comparatives, and friendliest or most friendly are the superlatives.
The comparative and superlative degrees of unfriendly are unfriendlier and unfriendliest. Less friendly and least friendly would also be good ways of conveying those ideas.
The comparative form of "friendly" is "friendlier," and the superlative form is "friendliest."
The comparative and superlative degrees of clean are cleaner and cleanest.
Nouns don't have superlative degrees.
Get is a verb and does not have comparative or superlative degrees.
the superlative of friendly is friendliest
friendlier, friendliest
out
Either is not an adjective. It has no degrees.
Friendlier and friendliest, respectively. More and most friendly are also correct, sometimes.
best
your ugly>3 Uh.. kay. Friendliest (Or "most friendly")