The compound adjective "west-central" is a modern English formation that combines two established spatial descriptors. "West" originates from the Proto-Germanic westrą, fundamentally tied to the direction of the sunset, a concept deeply embedded in the geography of Indo-European peoples. "Central" derives from the Latin 'centrum', itself borrowed from Greek 'kéntron' (sharp point, stationary point of a compass), which evolved to signify the middle point of a circle or sphere. The logic of the compound is transparently geographical: it first specifies a broad western orientation ("west") and then refines it to indicate the central portion within that western area ("-central"), creating a precise locational label.

Structure: west (direction) + central (position) - west: From Old English 'west', of Germanic origin; related to the direction of the setting sun. Functions as a directional noun/adjective. - central: From Latin 'centralis', from 'centrum' (center). Functions as an adjective meaning 'of, at, or forming the center'.