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Indefatigable vs Focus - What's the difference?

indefatigable | focus |

As an adjective indefatigable

is extremely persistent and untiring.

As a noun focus is

(countable|optics) a point at which reflected or refracted rays of light converge.

As a verb focus is

to cause (rays of light, etc) to converge at a single point.

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

    focus

    English

    (wikipedia focus)

    Noun

  • (countable, optics) A point at which reflected or refracted rays of light converge.
  • (countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.
  • (uncountable, photography, cinematography) The fact of the convergence of light on the photographic medium.
  • * {{quote-magazine, year=2013, month=July-August, author= Catherine Clabby
    • , magazine=(American Scientist), title= Focus on Everything , passage=Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus'.
  • (uncountable, photography, cinematography) The quality of the convergence of light on the photographic medium.
  • (uncountable) Concentration of attention.
  • (countable, seismology) The exact point of where an earthquake occurs, in three dimensions.
  • (computing, graphical user interface) The indicator of the currently active element in a user interface.
  • (linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.

    • Verb

  • To cause (rays of light, etc) to converge at a single point.
  • To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
    • You'll need to focus the microscope carefully in order to capture the full detail of this surface.
  • To concentrate one's attention.
    • Focus on passing the test.
  • To concentrate one’s attention.
    • If you're going to beat your competitors, you need to focus .

    Usage notes

    The spellings focusses'', ''focussing'', ''focussed'' are more common in Commonwealth English than in American English, but in both varieties they are less common than the spellings ''focuses'', ''focusing'', ''focused .

    Derived terms

    * focus group * in focus * out of focus

    Related terms

    * focal