Demure, reserved (3)
I believe the answer is:
coy
I believe this is a double definition.
'demure' is the first definition.
(synonyms)
'reserved' is the second definition.
(both can mean shy)
(Other definitions for coy that I've seen before include "Pretending modesty" , "Affectedly modest or shy" , "not forthcoming" , "Pretending shyness" , "Demure, like Marvell's mistress" .)