An ingrate is somebody who shows no thanks for kindness. An ungrateful ingrate, called him an ingrate, a pack of ingrates.
It is a strong and slightly literary insult, and it is nearly always said in anger rather than in judgement. It is rarer than ungrateful and heavier for being a noun — calling somebody an ingrate names them rather than describing an act. Note ingratitude, which is much commoner; and that the Latin means disagreeable rather than unthankful.
1nouningrateSomebody who shows no thanks for kindness.
“After all we did for him, the ingrate didn't even say thank you.”
ingrate is an ungrateful person.
Latin ingratus is in- plus gratus, pleasing or thankful. Grateful, gratitude and grace come from the same pleasing.
Latin
ingrātus — disagreeable
Middle English
ingrat
English, today
ingrate
1393, in Middle English; Middle English ingrat, from Latin ingrātus (“disagreeable”), from in- + grātus. Cognate with French ingrat.
Etymology from Wiktionary, CC BY-SA