To endeavour is to strive for something. The endeavour itself is the thing you're striving for, the enterprise or undertaking. It's a primarily British spelling of the word.

The Middle English root of endeavour means to "put oneself in" or "do one's utmost," so if you endeavour to do something, you do it with earnestness and a fair amount of effort. Americans usually spell the word endeavor, but NASA named one of its space shuttles the Endeavour. Why the extra "u"? NASA was honoring the HMS Endeavour, the first ship ever used by the British explorer Captain James Cook.

Definitions of endeavour

n a purposeful or industrious undertaking (especially one that requires effort or boldness)

endeavor, enterprise
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fraudulent scheme, illegitimate enterprise, racket
an illegal enterprise (such as extortion or fraud or drug peddling or prostitution) carried on for profit
forlorn hope
a hopeless or desperate enterprise
business activity, commercial activity
activity undertaken as part of a commercial enterprise
a business especially one run on a large scale
the volume of commercial activity
any enterprise in which losses and gains cancel out
Type of:
labor, project, task, undertaking
any piece of work that is undertaken or attempted

n earnest and conscientious activity intended to do or accomplish something

attempt, effort, endeavor, try
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(baseball) the batter's attempt to get on base
the supreme effort one can make
the weakest effort or poorest achievement one is capable of
bid, play
an attempt to get something
crack, fling, go, offer, pass, whirl
a usually brief attempt
a tentative attempt
an initial attempt (especially outside your usual areas of competence)
contribution, part, share
the part played by a person in bringing about a result
the attempt to achieve equal rights or status
mug's game
a futile or unprofitable endeavor
power play, squeeze, squeeze play
an aggressive attempt to compel acquiescence by the concentration or manipulation of power
an attempt to acquire or gain something
shot, stab
informal words for any attempt or effort
an attempt to score in a game
nisus, pains, strain, striving
an effortful attempt to attain a goal
battle, struggle
an energetic attempt to achieve something
takeover attempt
an attempt to take control of a corporation
run, test, trial
the act of testing something
test, trial
the act of undergoing testing
basketball shot
throwing the basketball toward the hoop
bear hug
a takeover bid so attractive that the directors of the target company must approve it or risk shareholder protest
proxy fight
a measure used by an acquirer to gain control of a takeover target; acquirer tries to persuade other shareholders that the management of the target should be replaced
the part you are expected to play
any struggle between two skillful opponents (individuals or groups)
scramble, scuffle
an unceremonious and disorganized struggle
a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc.
clinical test, clinical trial
a rigorously controlled test of a new drug or a new invasive medical device on human subjects; in the United States it is conducted under the direction of the FDA before being made available for general clinical use
double blind
a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed; designed to reduce or eliminate bias in the results
preclinical phase, preclinical test, preclinical trial
a laboratory test of a new drug or a new invasive medical device on animal subjects; conducted to gather evidence justifying a clinical trial
audition, tryout
a test of the suitability of a performer
field trial
a test of young hunting dogs to determine their skill in pointing and retrieving
fitting, try-on, trying on
putting clothes on to see whether they fit
MOT, MOT test, Ministry of Transportation test
a compulsory annual test of older motor vehicles for safety and exhaust fumes
pilot program, pilot project
activity planned as a test or trial
jehad, jihad
a holy struggle or striving by a Muslim for a moral or spiritual or political goal
a fast shot made with a short powerful swing of the hockey stick
an attempt to put the soccer ball into the net by using the head
Snellen test
a test of visual acuity using a Snellen chart
joust, tilt
a combat between two mounted knights tilting against each other with blunted lances
Type of:
any specific behavior

v attempt by employing effort

endeavor, strive
to exert strenuous effort against opposition
be at pains, take pains
try very hard to do something
to strive with determination
Type of:
assay, attempt, essay, seek, try
make an effort or attempt

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