mirth 
/ˈmɚθ/ noun
/ˈmɚθ/ noun [noncount] formal + literary : happiness and laughter
▪ Her clumsy attempt to cut the cake was the cause of much mirth.
▪ Her clumsy attempt to cut the cake was the cause of much mirth.
— mirth·ful /ˈmɚθfəl/ adjective [more mirthful; most mirthful]
▪ He was in a mirthful mood.
/ˈmɚθfəl/ adjective [more mirthful; most mirthful] ▪ He was in a mirthful mood.
