( BrE ) ( NAmE en·deavor ) / ɪnˈdevə(r); NAmE / noun , verb
■ noun
[ U , C ] ( formal ) an attempt to do sth, especially sth new or difficult :
Please make every endeavour to arrive on time.
advances in the field of scientific endeavour
The manager is expected to use his or her best endeavours to promote the artist's career.
■ verb
[ v to inf ] ( formal ) to try very hard to do sth
SYN strive :
I will endeavour to do my best for my country.
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WORD ORIGIN
late Middle English (in the sense exert oneself ): from the phrase put oneself in devoir do one's utmost .