the act of drilling a hole in the earth in the hope of producing petroleum
so lacking in interest as to cause mental weariness; "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldn't capture their attention"; "what an irksome task the writing of long letters is"- Edmund Burke; "tedious days on the train"; "the tiresome chirping of a cricket"- Mark Twain; "other people's dreams are dreadfully wearisome"
something that causes or entails suffering; "I cannot think it a hardship that more indulgence is allowed to men than to women"- James Boswell; "the many hardships of frontier life"
an effort that is inconvenient; "I went to a lot of trouble"; "he won without any trouble"; "had difficulty walking"; "finished the test only with great difficulty"
a source of difficulty; "one trouble after another delayed the job"; "what's the problem?"
an event causing distress or pain; "what is the trouble?"; "heart trouble"
an unwanted pregnancy; "he got several girls in trouble"
to cause inconvenience or discomfort to; "Sorry to trouble you, but..."
mutability in life or nature (especially successive alternation from one condition to another)
a variation in circumstances or fortune at different times in your life or in the development of something; "the project was subject to the usual vicissitudes of exploratory research"
a question raised for consideration or solution; "our homework consisted of ten problems to solve"
a state of difficulty that needs to be resolved; "she and her husband are having problems"; "it is always a job to contact him"; "urban problems such as traffic congestion and smog"
a board game in which words are formed from letters in patterns similar to a crossword puzzle; each letter has a value and those values are used to score the game
protective secretion of the mucous membranes; in the gut it lubricates the passage of food and protects the epithelial cells; in the nose and throat and lungs it can make it difficult for bacteria to penetrate the body through the epithelium