бо хурсандӣ: happily, with happiness
They went to a distant region and both lived happily.
Вақте ки вориди Уршалим шудем, онҳо моро бо хурсандӣ қабул карданд.
When we arrived in Jerusalem, they received us with happiness.
Bonus:
Adding the suffix -ӣ to an adjective changes it to a noun.
хурсанд: happy
хурсандӣ: happiness
бо хурсандӣ: with happiness, happily
Some other examples:
ором: peaceful, quiet
оромӣ: peacefulness
бо оромӣ: peacefully, quietly
душвор: difficult
душворӣ: difficulty
бо душворӣ: with difficulty
осон: easy
осонӣ: ease
бо осонӣ: with ease, easily