Peak
Part of speech: verb
Definition: To reach a highest degree or maximum.
Part of speech: noun
Definition: A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap. The top, or one of the tops, of a hill, mountain, or range, ending in a point; often, the whole hill or mountain, esp. when isolated; as, the Peak of Teneriffe. The upper aftermost corner of a fore-and-aft sail; -- used in many combinations; as, peak-halyards, peak-brails, etc. The narrow part of a vessel's bow, or the hold within it. The extremity of an anchor fluke; the bill. For sine waves, the point at which the value of y is at its maximum.
Example sentence: I stopped painting in 1990 at the peak of my success just to deny people my beautiful paintings, and I did it out of spite.
Efflorescence
Part of speech: noun
Definition: The formation of a powdery surface on crystals, as a hydrate is converted to anhydrous form by losing loosely bound water of crystallization to the atmosphere.The production of flowers.(construction) An encrustation of soluble salts, commonly white, deposited on the surface of stone, brick, plaster, or mortar; usually caused by free alkalies leached from mortar or adjacent concrete as moisture moves through it.(metaphorical) Rapid flowering of a culture or civilisation etc.A redness, rash, or eruption on the skin.