Third-person singular simple present indicative form of endeavour.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "endeavours" in a sentence
"For the past twenty years, he has figured prominently in endeavours to resolve several serious and long-lasting conflicts."
"The Boeing Company certainly appears to be a company which knows its business, excels at it, and in its community endeavours is a good corporate citizen."
"Health services and education must now be regarded as twin endeavours, advancing mankind."