late-18th-century

This compound adjective is a modern English construction that precisely dates a historical period by combining three distinct temporal elements. The word "late," with its Germanic roots in the concept of slowness or lateness, evolved to denote the latter part of a duration. It is prefixed to the ordinal numeral "18th," which itself derives from the Old English counting system, to specify the final decades of the 1700s. This entire temporal marker is anchored by "century," a term of Latin military origin (centuria referring to a company of one hundred soldiers) that was adopted into English via French to signify a span of one hundred years. The compound's logic is strictly chronological, layering specificity to pinpoint an era within the broader eighteenth century.

Structure: late + 18th + century - late: From Old English læt (slow, tardy), of Germanic origin. In this compound, it functions as an adjective meaning "towards the end of a period." - 18th: A numeral formed from eighteen (from Old English eahtatīene) + the ordinal suffix -th (from Old English -þa, -þe). It functions as a specifying numeral. - century: From Latin centuria (a group of one hundred, a century), via French. It functions as a noun denoting a period of one hundred years.