hold in

verbs

close in; darkness enclosed him"
confine, enclose, hold in
lessen the intensity of; temper; hold in restraint; hold or keep within limits
"moderate your alcohol intake"; "hold your tongue"; "hold your temper"; "control your anger"
check, contain, control, curb, hold, hold in, moderate
hold back; keep from being perceived by others
"She conceals her anger well"
conceal, hold back, hold in