Answer: shiest

AnswerCrossword Clue
SHIEST

Least outgoing

SHIEST

Most bashful

SHIEST

Most retiring

SHIEST
Least gregarious
SHIEST
Most reserved
SHIESTSlowest to mix, perhaps
SHIESTMost coy
SHIESTLeast outspoken
SHIESTLeast extroverted
SHIESTMost timid
SHIESTMost diffident
SHIESTSuperlatively coy
SHIESTDemurest.
SHIESTMost wary.
SHIESTTimidest.
SHIESTMost timid.
SHIESTMost retiring.
SHIESTMost like a wallflower
SHIESTLeast forward
SHIESTLeast likely to take command
SHIESTMost withdrawn
SHIESTMost timorous
SHIESTMost introverted
SHIESTRetiring to the max