For judo it means have a GI
contest (actually the question where you must know the correct answer to win a prize)
suit
khakis
Yes it is
type of clothes
The word attire refers to clothing, formal or dressy in particular.
Dress is what is meant by attire. You may receive receive an invitation specifying formal dress. That would mean formal attire. It is what you are wearing.
No, the correct sentence would be "She was the most unlikely winner of the beauty contest." The word "was" should be used instead of "is", and "unlikeliest" should be changed to "unlikely" for proper grammar.
A type of poo
A suit,tie,dress shoes and and a coat.
The correct spelling of the adverb is competitively (in a contest or competition).
It means you are very simple