気をつけた

was careful

→ 気
phrase Rare #36,088
was careful The past form of 気をつける, meaning to be careful or take care. In 気をつけたほうがいい, it appears in the pattern meaning “should be careful.”
JA: 道が滑りやすかったので、転ばないように気をつけた。
EN: The road was slippery, so I was careful not to fall.

彼女の家に行くのは気をつけたほうがいいよ

You’d better be careful about going to her house.

彼女はコップ割らないように気をつけた

She was careful not to break the glass.

転ばないように十分気をつけた

I was very careful not to fall.

私は彼を怒らせるようなことは一切言わないように気をつけた

I was careful not to say anything that might upset him.