sorrow; grief; anguish; distress
anxiety; worry; trouble; affliction; fear; misgivings
「憂い」 has another reading with different meanings.
母の病気で憂いが深くなりました。
My distress deepened due to my mother's illness.
将来への憂いを友達に話しました。
I talked to my friend about my worries for the future.
彼の顔には深い憂いが見えた。
Deep sorrow could be seen on his face.