having or showing knowledge and skill and aptitude; "adept in handicrafts"; "an adept juggler"; "an expert job"; "a good mechanic"; "a practiced marksman"; "a proficient engineer"; "a lesser-known but no less skillful composer"; "the effect was achieved by skillful retouching"
not ever; at no time in the past or future; "I have never been to China"; "I shall never forget this day"; "had never seen a circus"; "never on Sunday"; "I will never marry you!"
not at all; certainly not; not in any circumstances; "never fear"; "bringing up children is never easy"; "that will never do"; "what is morally wrong can never be politically right"
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.
an appraisal of the state of affairs; "they made an assay of the contents"; "a check on its dependability under stress"
a written report of the results of an analysis of the composition of some substance
a substance that is undergoing an analysis of its components