the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities
a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system
an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation
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"
the quality of being difficult; "they agreed about the difficulty of the climb"
a factor causing trouble in achieving a positive result or tending to produce a negative result; "serious difficulties were encountered in obtaining a pure reagent"
a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome; "grappling with financial difficulties"
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
in constant change; "his opinions are in flux"; "the newness and flux of the computer industry"
a flow or discharge
a state of uncertainty about what should be done (usually following some important event) preceding the establishment of a new direction of action; "the flux following the death of the emperor"
excessive discharge of liquid from a cavity or organ (as in watery diarrhea)
a substance added to molten metals to bond with impurities that can then be readily removed
the rate of flow of energy or particles across a given surface