[n.fawr-pohl, fohr-; v. fawr-pohl, fohr-] /n. ˈfɔrˌpoʊl, ˈfoʊr-; v. fɔrˈpoʊl, foʊr-/
noun
1.
Also called spile, spill. any of a number of boards or timbers driven forward on top of a set to protect miners lengthening a tunnel from falling debris.
verb (used with object), forepoled, forepoling.
2.
to reinforce (the end of an excavated tunnel) with forepoles.