hold in
verb.
close in
darkness enclosed him
Synonym: confine, enclose
verb.
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
Synonym: moderate, hold, curb, control, contain, check
verb.
hold back; keep from being perceived by others
She conceals her anger well
Synonym: conceal, hold back