The most damnable vice and most against justice, in mine opinion, is ingratitude, commonly called unkindness. He is unkind that denieth to have received any benefit, that indeed he hath received; he is unkind that dissimuleth; he is unkind that recompenseth not; but he is most unkind that forgetteth.—Sir T. Elyot, The Governor, b. ii. c. 13.

God might have made me even such a foule and unreasonable beast as this is; and yet was I never so kynde as to thancke Him that He had not made me so vile a creature; which thing I greatly bewayle, and my unkindenesse causeth me now thus to weepe.—Frith, Works, 1573, p. 90.

We have cause also in England to beware of unkindnesse, who have had in so fewe yeares the candel of Goddes woorde, so oft lightned, so oft put out; and yet will venture by our unthankfulnesse in doctrine, and sinfull life, to leese againe lighte, candle, candlesticke, and all.—Ascham, The Scholemaster, b. i.

Unthrifty, }
Unthriftiness.

As the ‘thrifty’ will probably be the thriving, so the ‘unthrifty’ the unthriving; but the words are not synonymous any more, as once they were. See ‘Thrifty.’

What [is it] but this self and presuming of ourselves causes grace to be unthrifty, and to hang down the head? what but our ascribing to ourselves in our means-using, makes them so unfruitful?—Rogers, Naaman the Syrian, p. 146.

Staggering, non-proficiency, and unthriftiness of profession is the fruit of self.—Id., Index.

Unvalued. This and ‘invaluable’ have been usefully desynonymized; so that ‘invaluable’ means now having a value greater than can be estimated, ‘unvalued’ esteemed to have no value at all. Yet it was not so once; though in Shakespeare (see Hamlet, act i. sc. 3) our present use of ‘unvalued’ occasionally obtained.

Two golden apples of unvalued price.

Spenser, Sonnet 77.