- 固定【こてい】 - fixing (in place), being fixed (in place), securing, anchoring, fastening down, fixing (e.g. salary, capital), keeping the same, fixation (histology), user name (on an online forum like 2ch where the majority of users post anonymously), user of an online handle (instead of posting anonymously) 
- 頑固【がんこ】 - stubborn, obstinate, pigheaded 
- 固める【かためる】 - to harden, to freeze, to strengthen, to solidify, to make (a fist), to tramp down (snow, dirt), to put together, to collect, to gather, to consolidate, to make secure, to stabilize, to settle down, to strengthen (belief, resolution, etc.), to establish (evidence), to fortify, to reinforce, to support, to wear for a specific purpose (armor, coat, etc.), to swear, to resolutely vow, to sincerely promise, to tie tightly, to fasten, to hold a bow fully drawn 
- 固まる【かたまる】 - to harden, to solidify, to become firm, to become certain, to gather (together), to assemble, to huddle together 
- 固有【こゆう】 - characteristic, traditional, peculiar, inherent, native, eigen- 
- 固体【こたい】 - solid (body), solid matter, solid-state 
- 固形【こけい】 - solid (body) 
- 固執【こしつ】 - sticking to (an opinion, theory, belief, etc.), clinging to, adherence, persistence, insistence 
- 堅固【けんご】 - solid, strong, firm 
- 断固【だんこ】 - firm, determined, resolute, conclusive 
- 固め【かため】 - hardening, fortifying, pledge, vow, defense, defence, guarding 
- 固定資産【こていしさん】 - fixed assets 
- 強固【きょうこ】 - firm, strong, solid, stable 
- 確固【かっこ】 - firm, unshakeable, resolute 
- 固定費【こていひ】 - fixed cost, fixed expense 
- 固定観念【こていかんねん】 - fixed idea, idée fixe, stereotype, prejudice 
- 固有名詞【こゆうめいし】 - proper noun 
- 固辞【こじ】 - firm refusal 
- 固化【こか】 - solidification 
- 固定票【こていひょう】 - solid (an assured, a safe) vote, solid (assured) support