Opposite Word of untroubled:
"troubled, annoyed, harassed, harried, pestered, vexed, anxious, nervous, queasy, uneasy, unquiet, buffeted, storm-tossed, tempest-tossed, tempest-tost, tempest-swept, careful, care-laden, heavy-laden, clouded, disquieted, distressed, disturbed, upse
"troubled, annoyed, harassed, harried, pestered, vexed, anxious, nervous, queasy, uneasy, unquiet, buffeted, storm-tossed, tempest-tossed, tempest-tost, tempest-swept, careful, care-laden, heavy-laden, clouded, disquieted, distressed, disturbed, upse