alarm, alarum, 'larm, 'larum (n.)
arousal, incitement, encouragement
[Iago to Cassio, of Desdemona] when she speaks, is it not an alarum to love?
[Adonis to Venus, of his heart] To love's alarms it will not ope the gate
SHAKESPEARE'S WORDS © 2018 DAVID CRYSTAL & BEN CRYSTAL