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Efficiently vs Indefatigable - What's the difference?

efficiently | indefatigable |

As an adverb efficiently

is in an efficient manner.

As an adjective indefatigable is

extremely persistent and untiring.

efficiently

English

Adverb

(en adverb)
  • In an efficient manner.
  • * {{quote-news
    • , year=2011 , date=October 1 , author=Phil Dawkes , title=Sunderland 2 - 2 West Brom , work=BBC Sport citation , page= , passage=The second half was a less open affair, in which West Brom grew increasingly and efficiently conservative.}}

    indefatigable

    English

    Adjective

    (en adjective)
  • Extremely persistent and untiring.
  • *
    • but he was at the same time an excellent scholar, and most indefatigable in teaching the two lads.
  • * 1898 , :
    • All night long the Martians were hammering and stirring, sleepless, indefatigable , at work upon the machines they were making ready, and ever and again a puff of greenish-white smoke whirled up to the starlit sky.

    Synonyms

    * inexhaustible, tireless, unflagging, unsinkable, untiring, unwearying,

    Antonyms

    * defatigable (much less common)

    Derived terms

    * indefatigably * indefatigability * indefatigableness