1) At the extreme of retiring 2) Coquettish in the extreme 3) Coquettish to the max 4) Flirtatious to the max 5) Least straightforward 6) Most coquettish 7) Most demure 8) Most modest 9) Most reserved 10) Most shy Found on https://www.crosswordclues.com/clue/coyest
1) At the extreme of retiring 2) Coquettish in the extreme 3) Coquettish to the max 4) Flirtatious to the max 5) Least straightforward 6) Most coquettish 7) Most demure 8) Most modest 9) Most reserved 10) Most shy