expression, noun-modifying (irregular)
well-modulated; nicely varied; lively; full-bodied; complex
Describes something with good contrast, rhythm, or variation—voice, writing, flavor, performance, etc. Often used as a prenominal modifier.
See also: メリハリ
彼女のメリハリの効いた話し方はとても聞きやすい。
Her well-modulated way of speaking is very easy to listen to.
このカレーはメリハリの効いた味で、スパイスが引き立っている。
This curry has a full-bodied flavor where the spices really stand out.
メリハリ is the noun meaning modulation, contrast, or rhythm; メリハリの効いた is the adjectival phrase meaning 'having good modulation/contrast'.
From メリハリ (modulation, contrast) + の + past form of 効く (to be effective). メリハリ itself originates from the music term 減り張り (meri-hari), referring to the lowering and raising of pitch in traditional Japanese music.