unexpansive (adjective) restrained: calm, quiet
Sinonime: bottled up, calm and collected, chilled,
conservative,
controlled,
cool, corked up,
discreet, in charge, in check, inobtrusive,
laid-back*,
mild,
moderate, muted, on a leash,
plain,
reasonable,
reticent, retiring, self-controlled, shrinking,
soft,
steady,
subdued,
tasteful,
temperate, unaffable, undemonstrative, under control, under wraps, unexcessive, unexpansive, unextreme,
unobtrusive,
uptight,
withdrawnAntonime: assured,
bold,
confident, extroverted,
outgoing