| 直 | 곧을 직, straight, erect, vertical (8) |
| 率直 | 솔직 | frankness |
| 正直 | 정직 | honesty |
| 直角 | 직각 | right angle |
| 直徑 | 직경 | diameter |
| 直流 | 직류 | direct current |
| 直面 | 직면 | confrontation |
| 直線 | 직선 | a straight line |
| 直言 | 직언 | plain speaking |
| 直腸 | 직장 | rectum |
| 直前 | 직전 | just immediately before |
| 直接 | 직접 | directly |
| 直接的 | 직접적 | directly, immediately |
| 直後 | 직후 | immediately after |