pitch-dark

the compound "pitch-dark" emerged in the late 16th century, leveraging the noun "pitch" (the thick, black, tar-like substance) as an intensifier. "Pitch" itself derives from old english pic, which has latin (pix) and greek (píssa) origins, all referring to the dark, viscous resin. the logic is metaphorical: just as pitch is profoundly black and opaque, "pitch-dark" describes an absolute, impenetrable darkness where no light is visible. the term exemplifies a common english compounding pattern where a concrete noun is used to intensify an adjective's meaning.

Structure: pitch (sense) + dark (sense) pitch (origin: middle english, from old english pic, functional role: noun used attributively to denote extreme degree); dark (origin: old english deorc, functional role: adjective denoting absence of light)