Verb (5-dan, る, transitive)
1. to sell
売ってしまおうかな。I wonder if I should just sell it.
2. to betray; to sell out (one's friend, country, etc.)
彼らが、私を売ったということかしら？Does that mean they sold me out?
3. to make (oneself) known; to establish (a reputation) for oneself
4. to pick (a fight, quarrel, etc.); to provoke; to force on someone
あっちがケンカ売って来るから！Because they're the ones picking fights with us!