1. not beset by troubles or disturbance or distress

- seemed untroubled by doubts of any kind

- untroubled sleep

- a kind untroubled face

Similar word(s): unconcerned, quiet, carefree, unworried, clear, dreamless, unconcerned, undisturbed, unmolested

2. free from fear or doubt; easy in mind

Similar word(s): secure, unafraid

3. free from turmoil or worries

- untroubled times

Similar word(s): quiet

Sentences with untroubled as an adjective:

- Once the exams were over she once more enjoyed untroubled sleep.