untroubled
adjective
[ ʌnˈtrʌb(ə)ld ]
• not feeling, showing, or affected by anxiety or problems.
• "a man untroubled by a guilty conscience"
Similar:
unworried,
unperturbed,
unconcerned,
unruffled,
undisturbed,
undismayed,
unbothered,
unagitated,
unflustered,
unanxious,
insouciant,
nonchalant,
blasé,
carefree,
blithe,
casual,
without a care in the world,
serene,
composed,
relaxed,
peaceful,
tranquil,
at ease,
devil-may-care,
happy-go-lucky,
cool,
calm,
and collected,
trouble-free,
unbroken,
uninterrupted,
laid-back,
unflappable,
chilled,
nonplussed,