Quote:
From Middle English forspeken (“to bewitch”), from Old English forspecan, forsprecan (“to speak in vain; to speak amiss; to denounce; to deny”)
1. (transitive, dialectal, Northern England and Scotland) To injure or cause bad luck through immoderate praise or flattery; to affect with the curse of an evil tongue, which brings ill luck upon all objects of its praise.
2. (transitive, obsolete) To bewitch, to charm.
3. (transitive, obsolete) To forbid, to prohibit; to oppose. [15th–19th c.]
4. (transitive, obsolete) To say bad things about; to slander.
"To bewitch" is in there, but it seems tangled up in more meanings of to curse or condemn. Combined with the etymology, it conjures up something ominous - to forbid, forbear, forswear, forsake, forget.