Thankless - Definition
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,
thankless, unthankful] [ant: grateful, thankful]
2: not likely to be rewarded; "grading papers is a thankless
task" [syn: thankless, unappreciated, ungratifying]