n. & v.
--n.
1. a roof-covering of straw, reeds, palm-leaves, or similar material.
2 colloq. the hair of the head.
--v.tr. (also absol.) cover (a roof or a building) with thatch.
Derivatives:
thatcher n.
Etymology: n. late collateral form of thack (now dial.) f. OE th{aelig}c, after v. f. OE theccan f. Gmc, assim. to thack