| 苦 | 쓸 고, bitter; hardship, suffering (11) |
| 苦難 | 고난 | agony, hardship |
| 苦惱 | 고뇌 | agony |
| 苦惱 | 고뇌 | anguish |
| 苦悶 | 고민 | worry, anguish |
| 苦悶- | 고민하다 | be in anguish, worried (conjugate verb) |
| 苦生 | 고생 | a hard life; privation |
| 苦生- | 고생하다 | to suffer, to have trials; to do something you don't want to do (conjugate verb) |
| 苦痛 | 고통 | agony |
| 苦痛 | 고통 | pain |
| 苦行 | 고행 | mortification |
| 苦行 | 고행 | penance |