unpreach means to undo or overthrow (something) by preaching; to revoke (something preached before). Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From un- + preach.
verb
- To undo or overthrow (something) by preaching; to revoke (something preached before).“The clergy their own principles denied: Unpreach'd their non-resisting cant, and pray'd / Their liberty and property's so dear”