Denshi Jisho — Online Japanese dictionary

弛む たるむ to slacken; to loosen; to relax
Common word, Godan verb with mu ending, Intransitive verb 
弛緩 しかん relaxation (e.g. of muscles); becoming flaccid
Noun, Suru verb 
弛む たゆむ to slacken; to loosen; to relax
Godan verb with mu ending, Intransitive verb 
弛み たるみ slack; slackening; dullness; letdown
Noun 
弛緩 ちかん relaxation (e.g. of muscles); becoming flaccid
Noun, Suru verb 
弛む ゆるむ 1: to become loose; to slacken (e.g. rope);
2: to become less tense; to relax; to let one's guard down;
3: to slacken (e.g. coldness, supervision); to become lax;
4: to become softer (e.g. ground, facial expression); (of ice) to partially melt;
5: to decrease (e.g. speed);
6: (of a market price) to go down slightly
Godan verb with mu ending, Intransitive verb 
弛める たるめる to slacken; to loosen
Ichidan verb, Transitive verb 
弛まる ゆるまる to become loose; to slacken; to soften
Godan verb with ru ending, Intransitive verb 
中弛み なかだるみ a slump
Noun, Suru verb 
腕弛るい かったるい 1: (Usually written using kana alone) listless; languid; sluggish;
2: irritating; exasperating; tiresome
Adjective 
弛まない たゆまない untiring; steady; persistent
Adjective, Usually written using kana alone 
弛みない たゆみない unslacking; unceasing
Adjective, Usually written using kana alone 
弛み無い たゆみない unslacking; unceasing
Adjective, Usually written using kana alone 
軍紀弛緩 ぐんきちかん lack of (slackness in) military discipline; demoralization
Noun 
筋弛緩剤 きんしかんざい muscle-relaxant drug
Noun 
弛緩性麻痺 しかんせいまひ flaccid paralysis
Noun 
倦まず弛まず うまずたゆまず tirelessly; perseveringly; without letting up
Expression 
一張一弛 いっちょういっし tension and relaxation
Noun 
弛緩出血 しかんしゅっけつ atonic hemorrhage; atonic haemorrhage
Noun 
弛張振動 しちょうしんどう relaxation oscillation
Noun 
弛まぬ努力 たゆまぬどりょく diligence; unceasing efforts
Expression 
筋肉弛緩剤 きんにくしかんざい muscle relaxant
Noun 

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