different between untroubled vs unexcited

English

un- +? troubled

untroubled (comparative more untroubled, superlative most untroubled)

Without worries; free from care.
Once the exams were over, she enjoyed untroubled sleep once more.

un- +? excited

unexcited (comparative more unexcited, superlative most unexcited)

Not feeling excitement or keen interest; placid; bored.
Having seen the film twice before, I felt distinctly unexcited at the prospect of a third viewing.
Not in a state of excitation.
- 1759, Literary Memoirs of Germany and the North
  From some excited bodies there proceeds for a certain distance to others unexcited, a light, which is reflected from the latter to the former, and in the reflexion snaps; and which upon touching the skin of a man or beast is felt with a smarting: This snapping light is call'd the electrical Sparks.

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