Demure

adjective/dɪˈmjʊɹ/character

Definition

Reserved, modest, and shy.

Etymology

Inherited from Middle English demure, demwre, an abbreviation of Anglo-Norman de mure port (“with a mature demeanor”) (compare Old French meur from Latin mātūrus):

Synonyms

retiring, shy, sober

In a sentence

Her demure manner belied a sharp strategic mind.