definition from
Oxford Dictionary of English –

betoken /bɪˈtəʊk(ə)n /
▸ verb [with object] literary be a sign of:
she wondered if his cold, level gaze betokened indifference or anger.
▪ be a warning or indication of (a future event):
the falling comet betokened the true end of Merlin’s powers.
– ORIGIN Old English betācnian, from be- (as an intensifier) + tācnian ‘signify’, of Germanic origin; related to token.