What is the Latin word for effectual?

The usual Latin words for “effectual” are efficāx, valeō, fortis; also praesēns, remedium. The right choice depends on the sense; see the distinctions below.

English → Latin

“effectual” in Latin

efficāxefficacious, effectual, powerful, efficient valeōto have strength, influence, power; to avail; to be well, healthy, sound; to be worth, be worthy fortisstrong, powerful; firm, resolute, steadfast, stout; courageous, brave praesēnspresent, immediate, at hand, existing; prompt; propitious remediumremedy, cure; medicine; aid, assistance

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

effectual

efficax: valens: fortis: praesens [SYN. in EFFECTIVE]. An effectual remedy, valens medicamentum (Cels.); praesens medicina, remedium (Col.); effectual consolation, valens solatium (Sen.); effectual against anything, valens adversus aliquid: to be effectual, vim habere (☞ not vim exserere); efficacem esse: to be very effectual, vim magnam habere: the medicine is effectual, concipitur venis medicamentum; is not effectual, medicina imbecillior est, quam morbus: to adopt more effectual measures, fortioribus reinediis agere: he thought that the most effectual measures should be taken to prevent this, ne id accideret, magnopere praecavendum sibi existimabat.

Quick answer

What is the Latin word for effectual?: The usual Latin words for “effectual” are efficāx, valeō, fortis; also praesēns, remedium. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.