Noun
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earnest and conscientious activity intended to do or accomplish something
"made an effort to cover all the reading material"
"wished him luck in his endeavor"
"she gave it a good try"
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a purposeful or industrious undertaking (especially one that requires effort or boldness)
"he had doubts about the whole enterprise"
Verb
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attempt by employing effort
"we endeavor to make our customers happy"