IPA: //ʌnˈɛksprest//
KK: /ʌnɪkˈsprɛst/
Not stated or shown; something that exists but is not revealed or communicated.
She had unexpressed feelings of sadness that she kept to herself.
Unexpressed → It is formed from "un-" (meaning not) and "expressed" (from Latin "exprimere", meaning to press out or to express). The word "unexpressed" means not expressed or not conveyed in words or form.
Think of 'not' ('un-') conveying something that is 'pressed out' or 'expressed' — that's why unexpressed means something that hasn't been communicated.