mildest (adjective) mild: gentle, temperate, nonirritating
Sinonime: antic, coltish,
frisky,
fun, gamesome,
gay, gleeful,
happy, impish,
jocular,
jovial, kittenish,
lively,
merry,
mischievous, roguish, rollicking, sportive, sprightly
Antonime: serious,
staid,
stiff