1. Not feeling or showing gratitude
   - ungrateful, thankless

See also: unappreciative

• deafen
• deafened
• deafening
• deafeningly
• deafness
• deal
• deal out
• dealer
• dealership
• dealfish
• dealignment
• dealing
• dealings
• deallocate
• dealt out
• deaminate
• deamination
• deaminisation
• deaminise
• deaminization
• deaminize
• dean
• Dean Acheson
• Dean Gooderham Acheson
• Dean Martin