What does endeavor mean?
An endeavor is a concerted, purposeful effort to accomplish something demanding, whether it be a grand undertaking like a scientific expedition or a personal goal pursued with determination. As a noun, it denotes both the attempt itself and the sustained exertion behind it: 'a bold endeavor.' As a verb, to endeavor means to strive or work diligently toward an end, as in 'she endeavored to keep her promise.' The word carries a distinctly formal and elevated register, suggesting seriousness of intent rather than casual trying, which makes it a staple of speeches, scholarship, and written prose. It derives from the phrase 'put oneself in duty' — literally to bind oneself to a task — a heritage that still echoes in its earnest tone. American English spells it 'endeavor,' while British English retains the older spelling 'endeavour.'
A serious or determined attempt to achieve something; an enterprise or undertaking requiring effort.
"Mapping the human genome was one of the great scientific endeavors of our time."
Often modified by adjectives such as 'human,' 'scientific,' or 'creative' to describe whole fields of activity.
To try hard or strive to achieve or do something.
"He endeavored to remain calm throughout the negotiation."
Usually followed by an infinitive ('endeavor to do something'); more common in American English than in British English.
The plural typically refers to multiple separate undertakings or efforts, as in 'his many endeavors.' It is less common than the singular when describing a single project.
"Her charitable endeavors spanned three continents."
The space shuttle Endeavour was named after Captain Cook's ship — which was itself named after this very word, meaning a determined effort.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of endeavor
'Endeavor' comes from the Middle English phrase 'putten in devoir,' meaning 'to put oneself in duty or obligation,' from the Old French 'devoir' meaning duty. This traces back to the Latin 'debere,' 'to owe,' which also gave English words such as 'due,' 'duty,' and 'debt.' The phrase was gradually fused into a single verb by the late Middle English period, with the noun sense following shortly after. The spelling diverged over time: American English simplified it to 'endeavor,' while British English preserved 'endeavour.'
Related word forms
How endeavor is actually used
The verb form is notably more common in American English; British English favors the noun and often prefers alternatives like 'try' or 'strive' for the verb. The word carries a formal, earnest register, lending dignity and seriousness to whatever effort it describes. The spelling 'endeavor' is standard in the US, while 'endeavour' is standard in the UK and other Commonwealth countries.
Easily confused with endeavor
An endearment is a word or expression of affection, whereas an endeavor is a serious attempt or effort toward a goal.