forfend
To prohibit; to forbid; to avert.
archaic
Clown: … You would know where Lord Anthonie is? I perceiue you. Shall I ſay he is in yond farme houſe? I deceiue you. Shall I tell you this wine is for him? the gods forfend, and ſo I end. Go fellow fighters theres a bob for ye.
Where it comes from
From Middle English forfenden (“to ward off, protect, prohibit”), equivalent to for- + fend.
Adapted from the Wiktionary entry forfend (CC BY-SA 4.0).