a kind and 'chivalrous' man
He acted 'chivalrously'.
a 'chivalrous' act
(..) Would that make me a better soldier? Couldn't hurt. Not in your case. This is bullshit. It's a fuckin' game, O'Neil. Mr. Newberry! You gonna be chivalrous, put a stop to this abuse? - O'Neil, tell him somethin' or I will! - Don't you tell him shit! Aaaah! Get him! (..)1997 G.I. Jane