介意
jiè yì · HSK 7
to care about
介 between + 意 mind: it gets between you and your peace = to mind, to care
介意 stacks 介 (to come between, intervene) with 意 (mind, intention). When something comes between you and your settled state of mind, you mind it or take offense. To not 介意 is to let it pass without it lodging in your thoughts.