プログレッシブ和英中辞典(第4版)の解説
こころぐるしい【心苦しい】
((人が主語で)) be sorry ((to do; that; about))，《口》 feel bad ((about))；((事柄が主語で)) weigh on one's mind [conscience]
ご厄介をかけて心苦しく思っています
I am sorry to have put you to so much trouble.
招待に応じられず心苦しい
I feel bad about not being able to accept the invitation.
弟の不品行が心苦しい
My brother's misconduct weighs on my mind.／It pains [distresses] me to see my brother acting improperly.