Difference between Ungrateful and Unpleasant

UNGRATEFUL vs UNPLEASANT: ADJECTIVE

Disagreeable
Not feeling or exhibiting gratitude, thanks, or appreciation.
Not agreeable or pleasant; repellent.
Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, etc.; ingrateful.
Not grateful; not expressing gratitude; a dissatisfied person.
Not feeling or showing gratitude

Not grateful; not feeling thankful or showing gratitude for favors; not making returns, or making ill returns, for kindness.
Exhibiting ingratitude; characterized by ingratitude: as, ungrateful conduct; ungrateful words.
Giving no return or recompense; offering no inducement: as, “th' ungrateful plain,”
Unpleasing; unacceptable; disagreeable.
Synonyms See grateful.

Resentful, Arrogant, Ingrat, Stinking, Dirty, Smelly, Stinky, Filthy, Crappy, Grateful, Ingrate, Unpleasant, Thankless, Unthankful, Unappreciative

Unhappy, Caustic, Acrid, Mortifying, Bitter, Unlovely, Grim, Obnoxious, Hellish, Harsh, Dreadful, Awful, Embarrassing, Nasty, Painful

Selfish, Resentful, Arrogant, Stinking, Dirty, Smelly, Stinky, Filthy, Crappy, Grateful, Ingrate, Unpleasant, Thankless, Unthankful, Unappreciative

Unhappy, Caustic, Acrid, Mortifying, Bitter, Unlovely, Grim, Obnoxious, Hellish, Harsh, Dreadful, Awful, Embarrassing, Nasty, Painful

Yet strange I am ungrateful to these teachers.
Yet strange, I am ungrateful to those teachers.
Why would the Press print this ungrateful story.
How ungrateful the proponents of this bill are.
Turkor the Ungrateful is a boss that be!
Complaining about not getting more presents is ungrateful.
Eun Tak makes dinner for her ungrateful aunt.
Opinions of the newspapers: Spain is not ungrateful.
When he looks out in an ungrateful shape!
The mood today is to be ungrateful to parents, ungrateful to grandparents, ungrateful to brothers and sisters, and even ungrateful to country.

II Stonedll driving is unpleasant, say marijuana smokers.
At its worst, it is painful and unpleasant.
And that presents a number of unpleasant symptoms.
Someone that is old, wrinkly and generally unpleasant.
Being set up for failure is incredibly unpleasant.
It left such a sticky and unpleasant film.
You meet your Tour MENTOR andthe UNPLEASANT STRANGER.
In general, pictures of death are less unpleasant, elicit less arousal, and have greater dominance than unpleasant pictures.
Similarly, the spiciness of black pepper is unpleasant to some people so it might also be unpleasant for rats.
Because punishment is unpleasant, it can also trigger aggression just like other unpleasant events.