Defn: To draw the screws from; to loose from screws; to loosen or withdraw (anything, as a screw) by turning it.

UNSCRUPULOUS
Un*scru"pu*lous, a.

Defn: Not scrupulous; unprincipled.
— Un*scru"pu*lous*ly, adv.
— Un*scru"pu*lous*ness, n.

UNSCRUTABLE
Un*scru"ta*ble, a.

Defn: Inscrutable. [R.]

UNSCUTCHEONED
Un*scutch"eoned, a.

Defn: Destitute of an escutcheon. [R.] Pollock.

UNSEAL
Un*seal", v. t. Etym: [1st pref. un- + seal.]

1. To break or remove the seal of; to open, as what is sealed; as, to
unseal a letter.
Unable to unseal his lips beyond the width of a quarter of an inch.
Sir W. Scott.

2. To disclose, as a secret. [Obs.] The Coronation.