ÞAKnafnorðhvorugkynn. [A. S. þæc; Engl. thack, thatch; Scot. thak; Germ. dach; Dan. tag; see þekja]:—thatch, roof, Edda 2, Nj. 115, Gkv. 3. 2, Fms. viii. 374; spán-þak, torf-þak, timbr-þak.2. metaph. = baug-þak, Grág. ii. 174.