thankless |
unthankful |
As adjectives the difference between thankless and unthankful
is that
thankless is (of a task) not appreciated or rewarded while
unthankful is not thankful; ungrateful.
unthankful |
unthankfully |
As an adjective unthankful
is not thankful; ungrateful.
As an adverb unthankfully is
in an unthankful way; ungratefully.
unthankful |
unthankfulness |
As an adjective unthankful
is not thankful; ungrateful.
As a noun unthankfulness is
the state or condition of being unthankful; ingratitude.