Arrogant
Haughty, Pride
な adjective, noun
You are proud and bursting with overconfidence, so it naturally follows that you would be an arrogant and haughty person. Pride always comes before the fall, though, so… watch yourself.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
あんな傲慢な男は初めてだよ。
This is the first time I've met such an arrogant man.