lets off steam (verb) have a ball: have fun
Sinonime: backward,
bashful, blenching, chary, constrained,
coy,
demure, distrustful,
doubtful,
dubious, flinching, humble,
insecure, meek, modest, mousy, rabbity,
reluctant, reserved, retiring,
self-conscious, self-effacing,
sheepish, shrinking,
shy,
suspicious,
timid,
timorous, unassertive, unassuming, unassured,
unobtrusive, unpoised,
unsure,
withdrawnAntonime: bold,
confident