thankless

adj 1: not feeling or showing gratitude; "ungrateful heirs"; "How

sharper than a serpent's tooth it is / To have a

thankless child!"- Shakespeare [syn: {ungrateful}, {unthankful}]

[ant: {grateful}]

2: not likely to be rewarded; "grading papers is a thankless

task" [syn: {unappreciated}, {ungratifying}]