unthankful

[uhn-thangk-fuh l] /ʌnˈθæŋk fəl/
adjective
1.
not thankful; ungrateful.
2.
not repaid with thanks; thankless:
"an unthankful task."
Origin
1350–1400; Middle English; see un-1, thankful
Related forms
unthankfully, adverb
unthankfulness, noun

Difficulty index for un thankful

Few English speakers likely know this word

Tile value for un

2
4
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