quarter-hour

The term 'quarter-hour' is a transparent compound formed from two English words of Latin origin. 'Quarter' originates from the Latin quartus, meaning "fourth", which evolved through Old French to denote one of four equal parts. 'Hour' traces back to the Greek hōra, signifying a fixed period or season, which was adopted into Latin as hora for a specific division of the day. The compound logically combines these elements, where 'quarter' specifies the fraction and 'hour' the whole unit, to precisely denote a fifteen-minute interval, or one-fourth of a sixty-minute hour. This construction exemplifies a common method in English for creating precise temporal measurements through straightforward numerical division of established units.

Structure: quarter (one fourth) + hour (period of time) quarter: From Latin quartarius (a fourth part), via Old French quartier. In this compound, it functions as a quantifying element meaning "one fourth". hour: From Old French hore, from Latin hora (hour, time), from Greek hōra (season, hour). In this compound, it functions as the base noun denoting a unit of time.