merrily

adverb
1
in a happy, cheerful way
شادمانه, سرخوشانه, خوشحالانه
2
without thinking about the problems that your actions might cause
بی‌خیال, سبکسرانه, بی‌فکرانه
She carried on merrily, not realizing the offence she was causing.
synonym gaily