adj.<贬>固执己见的,武断的,自用,师心自用
One should never be presumptuous and opinionated.
切不可自以为是.
He is too opinionated to listen to anyone else.
他太固执己见,听不进别人的意见.
He is the most opinionated man I know.
他是我所认识的最固执己见的人.