For tis the sport to haue the enginer / Hoist with his owne petar
puhekieltä A loud firecracker.
puhekieltä To attack or blow a hole in (something) with a petard.
(RQ:Flr Mntgn Essay), I.56:
The souldier, if he but goe to besiege a cottage, to scale a castle, to rob a church, to pettard(transterm) a gate, to force a religious house, or any villanous act, before he attempt it praieth to God for his assistance, though his intents and hopes be full-fraught with crueltie, murther, covetise, luxurie, sacrilege, and all iniquitie.