adv. [f. prec. + -LY2.] In a thankless manner; without thanks; unthankfully.
1626. Bp. Hall, Contempl., O. T., XX. ii. The will of God may be done thanklessly.
1881. in Spurgeon, Treas. Dav., Ps. cxix. 75. Thanklessly receiving the gifts with no thought of the Giver.
