ungrateful
adjective
1 ungrateful
Not feeling or showing gratitude:
— Ungrateful heirs.
synonyms: thankless, unthankful.
Roget 917: ungrateful, unmindful, unthankful; thankless, ingrate, wanting in gratitude, insensible of benefits. forgotten; unacknowledged, unthanked†, unrequited, unrewarded; ill-requited.
2 ungrateful
Disagreeable.
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