ungrateful

a.不领情的，忘恩负义的

unforseen, unfortunate, unfortunately, unfounded, unfreeze, unfriendly, unfrock, unfulfilled, unfurl, ungainliness, ungainly, ungenerous, unget-at-able, unglazed, ungodly, ungovernable, ungracious, ungraciously, ungrammatical, ungrammatically, ungratefully, ungrudging, unguarded, unguent, unguided, unhappily, unhappiness, unhappy, unhealthily, unhealthiness, unhealthy, unheard, unheard-of, unheroic, unhesitating, unhinge, unholiness, unholy, unhoped-for, unhorse,