untruss means an untrusser or public whipper. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From un- + truss.
noun
- an untrusser or public whipper
verb
- To free from a truss; to untie or unfasten“a. 1701, John Dryden, epistle to Mr Julian
The choleric wight, untrussing all in rage”