unseasonable, a. inopportune, ill-timed, [untimely], premature.
unseasonably, adv. malapropos, [untimely].
unseemly, a. [unbecoming], [improper], indecorous.
unseen, a. [invisible], unperceived, [secret], [unnoticed], unobserved, [clandestine], surreptitious, furtive, [concealed], [underhand].
unselfish, a. magnanimous, [disinterested], altruistic, [charitable].
unselfishness, n. magnanimity, altruism, beneficence, [liberality].
unsentimental, a. [matter-of-fact], prosaic, pragmatical, [practical].
unserviceableness, n. inutility.
unsettle, v. [disorder], derange, [upset], unhinge, disconcert.
unsettled, a. [undetermined], [dubious], unadjusted, controvertible, [disputable]; [irresolute], [fickle], [changeable]; [roily], feculent, turbid.