彼が処方してくれた薬は効かなかった。

彼が処方してくれた薬は効かなかった。

The medicine he had prescribed failed to take effect.

彼(かれ)が処方(しょほう)してくれた薬(くすり)は効(き)かなかった。

Kare ga shohōshitekureta kusuri wa kikanakatta.

彼 (かれ)

he; him; his; boyfriend

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

処方 (しょほう)

prescription; formulation

薬 (くすり)

medicine; pharmaceuticals; (legal) drugs; efficacious chemical (i.e. gunpowder, pesticide, etc.); (pottery) glaze; small bribe

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

効く (きく)

to be effective; to show effect; to do its work; to carry out its function well; to be possible to use

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ショ、ところ、 -こ、お.る

Meanings: dispose, manage, deal with, sentence, condemn, act, behave, place

Readings: ホウ、かた、 -かた、 -がた

Meanings: direction, person, alternative

Readings: ヤク、くすり

Meanings: medicine, chemical, enamel, gunpowder, benefit

Readings: コウ、き.く、ききめ、なら.う

Meanings: merit, efficacy, efficiency, benefit