An ungrateful person. A person who always finds a way to undermine other people’s efforts by criticizing, gossiping and using harshy remarks.

To refuse to give a good report or reward someone’s effort.

<He is good at speaking about the weaknesses and failures of his companions>

<I have never heard her reward the efforts of her companions, but I always hear complaints from her about their short comings> ungrateful.

If your kind act of buying a donut for your friend gets you nothing but a complaint that the chocolate icing looks runny, then it sounds like your pal is an ingrate, someone who is not thankful for others’ kindness.

The noun ingrate comes from the Latin word ingratus, a combination of in-, meaning “not,” and gratus, or “grateful.” That pretty much sums up an ingrate: not grateful. 

It describes someone who tends to act this way in general, refusing to acknowledge others’ generosity, or even worse, seeming to expect special treatment, but always complaining of not being well treated.

You can tell someone is an ingrate but what isn’t said: