well
noun
a deep hole or shaft dug or drilled to obtain water or oil or gas or brine
a cavity or vessel used to contain liquid
an abundant source
“she was a well of information”
an open shaft through the floors of a building (as for a stairway)
an enclosed compartment in a ship or plane for holding something as e.g. fish or a plane's landing gear or for protecting something as e.g. a ship's pumps
verb
come up, as of a liquid
“Tears well in her eyes”
“the currents well up”
Synonymsswell
adjective
in good health especially after having suffered illness or injury
“appears to be entirely well”
“the wound is nearly well”
Oppositesillresulting favorably
“it's a good thing that I wasn't there”
“it is good that you stayed”
Synonymsgoodwise or advantageous and hence advisable
“it would be well to start early”
adverb
(often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well')
“the children behaved well”
“a task well done”
SynonymsgoodOppositesillthoroughly or completely; fully; often used as a combining form
“The problem is well understood”
“she was well informed”
indicating high probability; in all likelihood
“I might well do it”
“a mistake that could easily have ended in disaster”
Synonymseasily(used for emphasis or as an intensifier) entirely or fully
“a book well worth reading”
“was well aware of the difficulties ahead”
to a suitable or appropriate extent or degree
“the project was well underway”
“the fetus has well developed organs”
favorably; with approval
“their neighbors spoke well of them”
“he thought well of the book”
Oppositesillto a great extent or degree
“I'm afraid the film was well over budget”
“painting the room white made it seem considerably (or substantially) larger”
with great or especially intimate knowledge
“we knew them well”
Synonymsintimatelywith prudence or propriety
“You would do well to say nothing more”
“could not well refuse”
with skill or in a pleasing manner
“she dances well”
“he writes well”
Oppositesbadlyin a manner affording benefit or advantage
“she married well”
“The children were settled advantageously in Seattle”
SynonymsadvantageouslyOppositesbadlyin financial comfort
“They live well”
“she has been able to live comfortably since her husband died”
Synonymscomfortablywithout unusual distress or resentment; with good humor
“took the joke well”
“took the tragic news well”
Oppositesbadly
Source: WordNet 3.1, Princeton University