This is the 2141st most frequent Japanese word.
打っ
"打っ" is the connective form of the verb "打つ," meaning "to hit" or "to strike."
The word '打っ' is used to indicate striking or hitting an object in sports or similar contexts.
ピンポンのボールを打った。
I hit the ping pong ball.
Here, '打っ’' is part of an idiomatic expression '打って変わる', meaning to change drastically or suddenly.
打って変わった態度を示した。
Displayed a completely different attitude.
In this sentence, '打っ' is part of a word '打ちのめされる', metaphorically signifying being emotionally struck down.