efficacious

About 1.37 uses per million words.

Meaning

1. adjective Effective; possessing efficacy. .mw-parser-output .defdate{font-size:smaller}

   This medicine is efficacious.

Similar words

effectual effective impressive telling hard-hitting trenchant impelling efficacy effectively effectiveness

Often followed by

in than and for as means to remedy grace

Word family

efficaciously efficaciousness efficaciousnesses