Ungrateful

1.

ដែលអកតញ្ញូ, គុណ, ដែលនិរគុណ, ដែលអកតញ្ញូ, អាក្រក់, ដែលនិរផល, ដែលគ្មានអោយផល

1.

Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, etc.; ingrateful.

2.

Unpleasing; unacceptable; disagreeable; as, harsh sounds are ungrateful to the ear.