COIF is validvalid

to style the hair [v COIFED, COIFING, COIFS]

1,820 of 196,601 in NWL2023·also valid in CSW24

a covering for the head, especially the close-fitting cap of white lawn or silk originally worn by serjeants-at-law [n -S] / to put the hair into a coif, also QUOIF [v -ED, -ING, -S]