在乎 (zài hu): to care about, to mind

On the surface he pretends not to care, but in fact he cares a great deal about how others see him.

My mom always asks whether I've eaten; I know it's just because she cares about me too much.

Whether this job succeeds depends largely on the joint efforts of the team members.

She doesn't care what others say about her and insists on doing what she believes is right.

When two people are together, the most important thing is to care about each other, not just about yourself.