Smoke, especially foul-smelling or pungent smoke; dense or thick vapour; fine dust suspended in the air. Also as a count noun: a quantity of smoke or dust; a stench. Also (and in earliest use) figurative.
Old English; earliest use found in Vespasian Psalter: Canticles & Hymns. Cognate with Middle Dutch smooc (Dutch smook), Middle Low German smōk, Middle High German smouch (German Schmauch) from an ablaut variant (o-grade, hence with Germanic *au) of the Germanic base of smeek, with a suffix causing i-mutation in English (original i-stem).
To produce foul-smelling smoke; to smoke; to turn black in the smoke of a fire. Also occasionally with object: to blacken with smoke; to char.
Early 17th century (in an earlier sense). Probably from smeech.