different between mighty vs efficacious

English

Alternative forms

• mightie (obsolete)

Etymology

From Middle English mighty, mightie, mighti, myghty, mi?ty, ma?ty, from Old English mihti?, mehti?, meahti?, mæhti? (“mighty”), from Proto-West Germanic *maht?g (“mighty”), from Proto-Germanic *maht?gaz (“mighty”), equivalent to might +? -y.

Cognate with Scots michty, mychty, Saterland Frisian machtich, Dutch machtig, German Low German machtig, German mächtig, Swedish mäktig.

Pronunciation

• (UK) IPA^(key): /?ma?ti/
• (US) IPA^(key): /?ma?ti/, [?m???i]
• Rhymes: -a?ti

Noun

mighty (plural mighties)

1. (obsolete, rare) A warrior of great strength and courage.

Adjective

mighty (comparative mightier, superlative mightiest)

1. Very strong; possessing might.

   He's a mighty wrestler, but you are faster than him.

   • Wise in heart, and mighty in strength.

2. Very heavy and powerful.

   Thor swung his mighty hammer.

   He gave the ball a mighty hit.

3. (colloquial) Very large; hefty.
   • 1809, Washington Irving, A History of New-York from the Beginning of the World to the End of the Dutch Dynasty, by Diedrich Knickerbocker

     Having listened attentively to the statement of Wandle Schoonhoven, giving an occasionable grunt, as he shovelled a mighty spoonful of Indian pudding into his mouth […]

4. Accomplished by might; hence, extraordinary; wonderful.

   • His mighty works

   • Mighty was their fuss about little matters.

5. (informal) Excellent, extremely good.

   Tonight's a mighty opportunity to have a party.

   She's a mighty cook.

Derived terms

• high and mighty
• mightiness
• unmighty

Translations

Adverb

mighty (not comparable)

1. (colloquial, dialect) Very; to a high degree.

   • The lady is not heard of, and the King mighty angry and the Lord sent to the Tower.

   • 1918, Edgar Rice Burroughs, The Land That Time Forgot Chapter IV

     I was mighty glad that our entrance into the interior of Caprona had been inside a submarine rather than in any other form of vessel. I could readily understand how it might have been that Caprona had been invaded in the past by venturesome navigators without word of it ever reaching the outside world, for I can assure you that only by submarine could man pass up that great sluggish river, alive.

Related terms

• might
• almighty

English

Etymology

From Old French efficacieux, from Latin effic?x (“efficacious”) +? -ous, from efficere (“to effect, to accomplish”); see effect.

Pronunciation

• IPA^(key): /?f.?.?ke?.??s/

  Rhymes: -e???s

Adjective

efficacious (comparative more efficacious, superlative most efficacious)

1. (formal) Effective; possessing efficacy. [from 1520s]

   Synonym: effective

   Antonym: inefficacious

Related terms

Translations

Further reading

• efficacious in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• efficacious in The Century Dictionary, New York, N.Y.: The Century Co., 1911.
• “efficacious”, in Lexico, Dictionary.com; Oxford University Press, 2019–present.