Denshi Jisho — Online Japanese dictionary

効 かい effect; result; worth; use; avail
Noun 
効 こう efficacy; benefit; efficiency; effect; result; success
Noun 
効く きく 1: to be effective; to show effect;
2: to do its work; to carry out its function well;
3: to be possible to use
Common word, Godan verb with ku ending, Intransitive verb 
効き きき effectiveness (esp. of drugs)
Noun 
効果 こうか effect; effectiveness; efficacy; result
Common word, Noun, No-adjective 
倣う ならう to imitate; to follow; to emulate
Common word, Godan verb with u ending, Intransitive verb, Usually written using kana alone 
習う ならう to take lessons in; to be taught; to learn; to study; to get training in
Common word, Godan verb with u ending, Transitive verb 
効目 ききめ effect; virtue; efficacy; impression
Noun 
傚う ならう to imitate; to follow; to emulate
Godan verb with u ending, Intransitive verb, Usually written using kana alone 
効き目 ききめ effect; virtue; efficacy; impression
Common word, Noun 
慣らう ならう to imitate; to follow; to emulate
Godan verb with u ending, Intransitive verb, Usually written using kana alone 
効能 こうのう effect; efficacy; virtue; benefit
Common word, Noun 
効用 こうよう use; utility; effect; benefit
Common word, Noun 
効率 こうりつ efficiency; efficacy; performance; utility factor
Common word, Noun 
効験 こうけん efficacy; effect
Noun 
効力 こうりょく effect; efficacy; validity; potency
Common word, Noun 
効果的 こうかてき effective; successful
Common word, Na-adjective 
効果音 こうかおん sound effect; sound effects
Noun 
効率化 こうりつか making efficient; optimization
Noun, Suru verb 
効が有る こうがある to be beneficial to; to be efficacious
Expression 
効率的 こうりつてき efficient
Common word, Na-adjective 
効率性 こうりつせい efficiency
Noun 
効能書き こうのうがき statement of the efficacy of a medicine
Noun 
効果覿面 こうかてきめん bring an immediate result on; have an instant effect on
Noun 
効果抜群 こうかばつぐん exceptionally effective; overwhelming effectiveness
Noun, Na-adjective, No-adjective 
効率の良い こうりつのよい efficient
Noun, Computer terminology 
効果が上がる こうかがあがる to bear fruit; to take effect
Expression, Godan verb with ru ending 
効用関数 こうようかんすう utility function
Noun 
効果の法則 こうかのほうそく law of effect
Noun 
習うより慣れよ ならうよりなれよ practice makes perfect (implying that it is better to learn from personal experience than from an instructor)
Expression 
効率向上 こうりつこうじょう improvement in efficiency
Noun 
効用最大化 こうようさいだいか utility maximization; utility maximisation
Noun, Suru verb 

Found 32 words.

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