WordReference Random House Learner's Dictionary of American English © 2015
ef•fort /ˈɛfɚt/USA pronunciation n. 
  1. [uncountable] the use of physical or mental power:It will take great effort to achieve a victory.
  2. [countable] a try;
    an attempt.
  3. [countable] something done by hard work.
ef•fort•less•ly,adv. See -fort-.

Collins Concise English Dictionary © HarperCollins Publishers::

effort /ˈɛfət/ n
  1. physical or mental exertion, usually considerable when unqualified
  2. a determined attempt
  3. achievement; creation
Etymology: 15th Century: from Old French esfort, from esforcier to force, ultimately from Latin fortis strong; see force1

ˈeffortful adj

'effort' also found in these entries:

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