single-spaced

the compound adjective "single-spaced" is a modern formation from the established english words "single" and "space". "single" traces back to latin singulus, meaning one or individual, which itself may derive from a proto-indo-european root meaning "one". "space" originates from latin spatium, denoting an expanse or interval. the suffix "-ed" is a common germanic adjectival ending. the term's logic is transparent: it literally describes text "having the quality of a single space" between lines, contrasting with double-spaced text. it emerged as a specific typographical term in the context of writing and printing to prescribe or describe line spacing.

Structure: single (one) + space (blank area) + ed (adjective suffix) single: from latin singulus (one, individual), functioning as a modifier meaning "one" or "individual". space: from old french espace, from latin spatium (room, area, interval), functioning as the core noun meaning an interval or blank area. ed: from old english -ede, -od, -ad, a suffix forming adjectives from nouns, indicating "having the quality of".