single-year

The compound adjective "single-year" is a transparent modern English formation. Its first element, "single," traces back to Latin singulus, meaning "one, individual, separate," which itself may derive from a Proto-Indo-European root meaning "one." The second element, "year," originates from the Old English gēar, a term for a cycle of seasons, with deep Germanic and Indo-European roots related to concepts of time and season. The logic of the word is straightforward, combining the concept of "one" with the unit of time "year" to create a term specifying something that occurs within, is measured by, or lasts for exactly one year.

Structure: single (one) + year (period of time) - single: From Latin singulus (one, individual). Functions as a combining form meaning "one" or "individual" in this compound. - year: From Old English gēar, from Proto-Germanic jērą. Functions as the base noun denoting a period of time.