Borrowed from Scots spae.
spae (third-person singular simple present spaes, present participle spaeing, simple past and past participle spaed)
- (Scotland) To divine; foretell
From Northern Middle English spā, from Old Norse spá (“to foretell, prophesy”), from Proto-Germanic *spahōną, *spēhōną (“to observe”), from Proto-Indo-European *speḱ- (“to look”).
spae (third-person singular present spaes, present participle spaein, past spaed, past participle spaed)
- to prophesy, foretell, predict, tell fortunes
- to anticipate, wish, have ambitions for