不 透 氣 bù tòu qì : airtight

不 透 水 bù tòu shuǐ : waterproof; watertight; impermeable

蹬 dèng : step into (as tight shoe)

Big5: , Unicode: 8e6c (蹬),
Links: MT, Cantonese, Ld, Chinese Language

加 強 管 制 jiā qiáng guǎn zhì : to tighten control (over sth)

緊 [紧] jǐn : tight; nervous; strict

Big5: , Unicode: 7dca (緊),
Links: MT, Cantonese, Ld, Chinese Language

緊 緊 jǐn jǐn : closely; tightly

緊 縮 jǐn suō : reduce; tighten; cut back (budget, etc)

拉 緊 lā jǐn : strain; tense; tighten

煞 shā : decrease; tighten

Big5: , Unicode: 715e (煞),
Links: MT, Cantonese, Ld, Chinese Language

上 絃 shàng xián : wind; tighten

瘦 «痩» shòu : tight; thin; lean

Big5: , Unicode: 7626 (瘦),
Links: MT, Cantonese, Ld, Chinese Language

束 緊 shù jǐn : gird; tighten

嚴 [严] «厳» yán : (air or water) tight; stern; serious; strict; severe

Big5: , Unicode: 56b4 (嚴),
Links: MT, Cantonese, Ld, Chinese Language

嚴 格 yán gé : strict; stringent; tight

嚴 竣 yán jùn : tight; strict; severe; stern; difficult

嚴 密 yán mì : strict; tight (organization, surveillance, etc.)