Answer:

shyest

Answer	Crossword Clue
SHYEST	Most withdrawn
SHYEST	Most bashful
SHYEST	Least outgoing

SHYEST	Most timid
SHYEST	Least bold
SHYEST	Having the most social anxiety
SHYEST	Reserved to the maximum extent
SHYEST	Most coy
SHYEST	Most demure
SHYEST	Furthest from forward
SHYEST	Most reticent

SHYEST	Most withdrawing
SHYEST	Most retiring