[un.de.mon.stra.tive] adj (1846): restrained in expression of feeling: reserved -- un.de.mon.stra.tive.ly adv -- un.de.mon.stra.tive.ness n
UNDEMONSTRATIVE
Meaning of UNDEMONSTRATIVE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012