Words: hoise, hoist, petard [MW]

Function: transitive verb
Inflected Form(s): hoised /'hoizd /; or hoist /'hoist/; hois·ing /'hoi-zi[ng]/
Etymology: alteration of hysse to hoist, perhaps from Low German hissen
: HOIST 1
- hoist with one's own petard or hoist by one's own petard : victimized or hurt by one's own scheme

Function: verb
Etymology: alteration of hoise
transitive verb
1 : LIFT, RAISE; especially : to raise into position by or as if by means of tackle
2 : DRINK 1
intransitive verb : to become hoisted : RISE
synonym see LIFT

Function: noun
Etymology: Middle French, from peter to break wind, from pet expulsion of intestinal gas, from Latin peditum, from neuter of peditus, past participle of pedere to break wind; akin to Greek bdein to break wind
1 : a case containing an explosive to break down a door or gate or breach a wall
2 : a firework that explodes with a loud report

(So petard means breachcase or far'cracker?)