fə(r)ˈspēk transitive verb
Etymology: Middle English forspeken to cast a bad spell over, speak evil of, from Old English forspecan, forsprecan to speak in vain, deny, denounce, from for- + specan, sprecan to speak — more at speak
1. now dialect Britain : to cast a bad spell over : bewitch especially by immoderate praise
don't boast about the child, lest you forspeak him
2. obsolete : to speak against : asperse