'Untroubled' definitions:

Definition of 'untroubled'

From: WordNet
adjective
Not beset by troubles or disturbance or distress; "seemed untroubled by doubts of any kind"; "untroubled sleep"; "a kind untroubled face" [ant: troubled]
adjective
Free from fear or doubt; easy in mind; "he was secure that nothing will be held against him" [syn: secure, unafraid, untroubled] [ant: insecure]
adjective
Free from turmoil or worries; "untroubled times"

Definition of 'Untroubled'

From: GCIDE