From Japanese-English FreeDict Dictionary ver. 0.1:
苦 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, く /kˈɯᵝ/
1. (noun (common) (futsuumeishi))
pain, anguish, suffering, distress, anxiety, worry, trouble, difficulty, hardship
2. 八苦 [Buddhist term] duhkha (suffering)