| term | pronunciation | English |
|---|
| 固い | かたい | hard |
| 堅/硬/固い | かたい | solid, hard, firm |
| 凝固 | ぎょうこ | coagulation, freezing, solidification |
| 固め | かため | hardening, defense, defence, fortifying, pledge |
| 固める | かためる | to harden, to freeze, to fortify |
| 固体 | こたい | solid (body), solid matter, solid-state |
| 固定 | こてい | fixation, fixing (e.g. salary, capital) |
| 固定資産 | こていしさん | fixed assets |
| 固有 | こゆう | characteristic, tradition, peculiar, inherent, native, eigen- |
| 固有名詞 | こゆうめいし | proper noun |
| 堅固 | けんご | solid, strong, firm |
| 強固 | きょうこ | firmness, stability, security, strength |
| 確固 | かっこ | firm, unshakeable, resolute |
| 禁固 | きんこ | imprisonment, confinement |
| 窒素固定 | ちっそこてい | nitrogen fixation |
| 窒素固定法 | ちっそこていほう | nitrogen fixation (method) |
| 頑固 | がんこ | stubbornness, obstinacy |