1. 
2. 
[syn: secure, unafraid, untroubled]
3.  free from turmoil or worries; 
- Example: "untroubled times"
The Collaborative International Dictionary of English v.0.48:
Untroubled \Untroubled\
   See troubled.
WordNet (r) 3.0 (2006):
untroubled
    adj 1: not beset by troubles or disturbance or distress; "seemed
           untroubled by doubts of any kind"; "untroubled sleep"; "a
           kind untroubled face" [ant: troubled]
    2: free from fear or doubt; easy in mind; "he was secure that
       nothing will be held against him" [syn: secure, unafraid,
       untroubled] [ant: insecure]
    3: free from turmoil or worries; "untroubled times"
Moby Thesaurus II by Grady Ward, 1.0:
61 Moby Thesaurus words for "untroubled":
   at peace, at rest, bloodless, calm, cloistered, concordant, cool,
   dwindling, ebbing, even-tenored, halcyon, hushed, idyllic,
   impassive, isolated, moldering, orderly, pacific, pastoral,
   peaceable, peaceful, peacetime, piping, placid, quiescent, quiet,
   reposeful, reposing, restful, resting, secluded, sequestered,
   sequestrated, serene, sheltered, smooth, soft, still,
   still as death, stillish, stilly, stoic, stolid, subsiding,
   tranquil, unagitated, unbothered, undisturbed, unexcited,
   unflustered, unimpassioned, unmoved, unperturbed, unplagued,
   unruffled, unstirred, unstirring, untormented, unvexed, unworried,
   waning