UNSPOTTED
Un*spot"ted, a.
Defn: Not spotted; free from spot or stain; especially, free from moral stain; unblemished; immaculate; as, an unspotted reputation. — Un*spot"ted*ness, n.
UNSQUIRE
Un*squire", v. t. Etym: [1st pref. un- + squire.]
Defn: To divest of the title or privilege of an esquire. Swift.
UNSTABLE
Un*sta"ble, a. Etym: [Cf. Instable.]
Defn: Not stable; not firm, fixed, or constant; subject to change or
overthrow.
— Un*sta"ble*ness, n. Chaucer. Unstable equilibrium. See Stable
equilibrium, under Stable.
UNSTACK
Un*stack", v. t. Etym: [1st pref. un- + stack.]
Defn: To remove, or take away, from a stack; to remove, as something constituting a stack.
UNSTARCH
Un*starch", v. t. Etym: [Pref. un- + starch.]
Defn: To free from starch; to make limp or pliable.