(xī) amusement
(xīxì) to frolic; fun; a romp
(xīpíshì) hippie
(xīpíxiàoliǎn) happy and giggling (idiom); frivolous
(xīxiào) to be laughing and playing; to giggle
(xīxiàonùmà) lit. merry laughter and angry scolding; ironic and invective writing (idiom)
(xīyóu) to amuse oneself; to have fun