plain negative imperative form of 気にする: never mind!; don't worry about it.

to have an interest in something or somebody, to be inclined towards doing something

(idiomatic) to cause concern, to be worrisome, to be on one's mind / to be interested, to be curious

to give off the sense that ~ / to feel that ~; to think that ~ / to be in the mood to ~

be careful, watch out / take care

to be careful about ~

affectation

Watch yourself, be careful, literally, "keep your health" / take care (used when parting)

(idiomatic) to be unable to stomach, sticking in one's throat

a demonic or devilish aura, energy, mood, or atmosphere