| term | pronunciation | English |
|---|
| 既に | すでに | already, too late |
| 一粒子既約 | いちりゅうしきやく | one particle irreducible (physics) |
| 既刊 | きかん | already published |
| 既婚 | きこん | marriage, married |
| 既存 | きそん | existing |
| 既定 | きてい | default, established, pre-arranged, fixed, predetermined |
| 既得権 | きとくけん | vested rights |
| 既成 | きせい | established, completed, existing |
| 既成事実 | きせいじじつ | established fact, fait accompli |
| 既成概念 | きせいがいねん | stereotype, preconceived idea, preconceived notion |
| 既設 | きせつ | established, existing |
| 皆既 | かいき | total eclipse, totality |
| 皆既日食 | かいきにっしょく | total solar eclipse |
| 皆既蝕 | かいきしょく | total eclipse (of sun by moon), totality |
| 皆既食 | かいきしょく | total eclipse (of sun by moon), totality |