This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Not disturbed or distracted.

adj. Without trouble or disturbance; calm: untroubled sleep.

adj. Of or pertaining to a lack of worries.

Not troubled; not disturbed by care, sorrow, or business; not agitated; unmoved; unruffled; not confused; free from passion: as, an untroubled mind.

Not disturbed or raised into waves or ripples: as, an untroubled sea.

Not foul; not turbid: as, an untroubled stream.

adj. not beset by troubles or disturbance or distress

adj. free from turmoil or worries

adj. free from fear or doubt; easy in mind

"In their later years (he died in 1999), they talked regularly and at last settled into the kind of untroubled companionship that had eluded them during their marriage."

clear    unworried    trouble-free    unconcerned    undisturbed    unmolested    carefree    dreamless    quiet   

careless    calm   

bubbled    doubled    redoubled    troubled   

undisturbed    unruffled    unperturbed    tranquil    unmoved    unconcerned    uneventful    self-possessed    restful    oblivious