adj

efficacious

Efficacious (adj) means Effective; possessing efficacy.

adj

Effective; possessing efficacy.

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Etymology

From Old French efficacieux (whence -acious), from Latin efficāx (“efficacious”) + -ous, from efficere (“to effect, to accomplish”); see effect.

yous nous pious joyous heinous ominous curious anxious copious tenuous tedious spurious

What is the meaning of efficacious?

"efficacious" (adj) means effective; possessing efficacy.