sit-down

The compound "sit-down" is a transparent phrasal construction from core Germanic vocabulary. The verb "sit" originates from the Proto-Indo-European root sed- ("to sit"), which is remarkably stable across Indo-European languages, giving rise to Latin sedēre and Greek hezesthai. The adverb "down" derives from the Old English word for "hill," dūn, and came to denote a downward direction or a settled state. When combined, the literal sense of "lowering oneself into a seated position" provided a logical foundation for metaphorical extensions. By the early 20th century, this concrete action was applied to organized protests where participants refuse to move, and to formal meals where one remains seated, thus evolving from a simple physical description to terms for specific social and political acts.

Structure: sit (verb) + down (adverb) - sit: From Old English sittan, meaning "to occupy a seat, be seated, perch." It is a Germanic verb of Proto-Indo-European origin, functioning as the core action verb in this compound. - down: From Old English dūne, a shortened form of of dūne ("from the hill"), from dūn ("hill"). It evolved into an adverb indicating a downward or settled position, here modifying the verb to indicate the completion of the sitting action.