Meaning

adjective not saturated; capable of dissolving more of a substance at a given temperature

adjective used of a compound (especially of carbon) containing atoms sharing more than one valence bond

adjective (of color) not chromatically pure; diluted

originEtymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English saturated English unsaturated From un- + saturated.

Etymology from Wiktionary, CC BY-SA 3.0