Sc. Obs. [Dialectal form of FURL v.: see TH initial (6).] trans. = FURL v. 1.
1549. Compl. Scot., vi. 41. Tak in ȝour top salis, and thirl them.
1632. Lithgow, Trav., VII. 328. [We] thirle our Sailes, if Pirats but appeare.