spile v also spoil. Cp OED spiling vbl sb2 'dimensions of the curve or sny of a plank's edge' (1846-). To taper a plank at the end.
T 48-64 The way we used to spile off the plank, when you'd get up to the filler, you had a rule staff. That was a thin batten that would go the length o' your boat, and you'd spile off from each side, from the top one and from the bottom one. 1969 Nfld Qtly July, p. 20 Spoil-to taper wood. 1972 MURRAY 236 'We was plankin' a boat up there see, and I was spilin' the plank with the drawin' knife and had me hand like that, spilin' and he took holt and give it the pluck, and the knife went along and took me finger.'
