Warn
Warn (warn) , transitive verb
[Old English wernen, Anglo-Saxon weornan, wyrnan. Compare Warn to admonish.]
To refuse. [Obsolete] — Chaucer
Warn , transitive verb
[Old English warnen, warnien, Anglo-Saxon warnian, wearnian, to take heed, to warn; akin to Anglo-Saxon wearn denial, refusal, Old Saxon warning, wernian, to refuse, Old High German warnen, German warnen to warn, OFries. warna, werna, Icelandic varna to refuse; and probably to English wary. {not transcribed}.]
1.
To make ware or aware; to give previous information to; to give notice to; to notify; to admonish; hence, to notify or summon by authority; as, to warn a town meeting; to warn a tenant to quit a house.
Warned of the ensuing fight.
Cornelius the centurion... was warned from God by an holy angel to send for thee.
Who is it that hath warned us to the walls?
2.
To give notice to, of approaching or probable danger or evil; to caution against anything that may prove injurious.
Juturna warns the Daunian chief of Lausus' danger, urging swift relief.
3.
To ward off. [Obsolete] — Spenser