fifteen-minute

the compound adjective "fifteen-minute" is a modern english formation following the pattern of number-unit compounds used attributively. its first element, "fifteen," traces back to a germanic cardinal number system where it literally meant "five and ten." the second element, "minute," originates from the latin "pars minuta prima" (the first small part), denoting a division of an hour. when combined with a hyphen, these elements function as a single grammatical unit to specify a precise duration. this compounding logic is directly analogous to other time-related adjectives like "two-hour" or "ten-minute."

Structure: fifteen (numeral) + minute (time unit) fifteen is from old english 'fīftīene', a compound of 'fīf' (five) and 'tīene' (ten). minute is from latin 'minuta', meaning 'small part', via old french 'minute', referring to a sixtieth part of an hour.