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effectiveness [ɪ'fektɪvnɪs] adj.
gen.	効用 (kōyō) River and Water Resources Glossary (Infrastructure Development Institute Japan)
law	実効 (ぢっこう) Japanese Law Translation Database System
n effectiveness | n [ɪ'fektɪvnɪs] adj.
gen.	有効性 (ゆうこうせい); 利き news2 nf31; 効き 効き often refers to medicine news2 nf33 (きき)
n adj-no effectiveness | n adj-no [ɪ'fektɪvnɪs] adj.
gen.	効果 ichi1 news1 nf01 (こうか); 実効性
adj-na n effectiveness | adj-na n [ɪ'fektɪvnɪs] adj.
gen.	有効 ichi1 news1 nf02 (ゆうこう)