"To peak" means to reach the highest point, level, or value in a process or activity, often implying a temporary maximum before a decline. For example, in the phrase 'The value peaks under optimal conditions,' it refers to the value attaining its maximum under certain circumstances.
The verb "to peak" originates from the noun 'peak,' which means the pointed top of a mountain. The use of 'peak' as a verb metaphorically developed to describe reaching the highest point or maximum level, similar to a mountain's summit. This figurative use has been common since the late 19th century.
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"To peak" appears in the Vocaplus list "English - General - (B2) - set 2", containing 112 commonly used words.
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