the compound adjective "sweet-tempered" is a relatively modern formation, built from native english elements. its core, "temper," originates from the latin verb temperāre, meaning to mix or moderate, which entered english through old french, initially referring to the proper balance of qualities. the concept of one's innate "disposition" arose from this idea of a balanced mixture of humors or qualities. "sweet," from old english swēte, meaning agreeable or pleasant, is prefixed to directly describe the nature of that disposition. the suffix "-ed" is then added, following a common english pattern for forming compound adjectives (like "good-natured"), to mean 'possessing a sweet temper'. the term logically constructs the abstract quality of a gentle character from the literal notion of a pleasantly mixed or balanced inner state.

Structure: sweet (pleasant) + temper (disposition) + ed (having the quality of) - sweet: from old english swēte (pleasing to the senses, agreeable); functions as an adjective modifying the nature of the temper. - temper: from latin temperāre (to mix correctly, regulate); via old english and middle english, it evolved to mean 'character, disposition'. functions as the core noun denoting one's state of mind. - ed: from old english -ede, -od, a suffix forming adjectives from nouns, meaning 'having, provided with'.