Fiþer-byrste (?)

古英語辞典によると:

fiþer-byrste (?)

adj. Having four bristles (? of a stick split into four at the end) :-- Genim ǽnne sticcan and gewyrc hine feðorbyrste . . . styre mid ðý sticcan ðá buteran, Lch. iii. 24, 18. fiþer-byrste