"Gahuk" is a word in HILIGAYNON, CEBUANO

gáhuk - To become hollow, form a cavity,
sinus or fistula, said of an ulcerating
wound, of rottenness in timber, etc.
Naggáhuk ang íya pilás. His wound
formed a deep, festering cavity. Ang márka
sang karabáw nagkagáhuk (nagáhuk),
kay inúdlan. The brand on the buffalo
became deep, for it became infested by
worms. (cf. búhò, gwáb, gíab, gíkab).

gahuk n a pointed piece of wood about a foot in length used to dig sweet potatoes.