noun

endeavor

Translation

endeavour, effort, attempt

This was a difficult scientific endeavor.

This was a difficult scientific endeavour.

Success was the result of their combined endeavors.

Success was the result of their combined endeavours.

((an)) endeavor ((to-inf)) an attempt to do sth. He made an endeavor to learn the language.

Synonyms: attempt, effort, undertaking, venture

From Old French 'en devoir', meaning 'in duty'. It signifies an attempt or effort one feels a duty to perform.

Think of a great 'adventure' that requires a lot of 'endeavor' (effort). This is the American spelling.