Hijab

A head covering worn by Nasheenian women and some Chenjan women. More popular in Nasheen, as it does not fully cover the face - only the head, hair, and neck. In Nasheen it is considered a modest affectation worn by particularly conservative women who seek to emulate the Prophet's wives or older, rural women seeking to safeguard their heads from the harsh suns (org. Arabic. Hijaab https://en.wikipedia.org/wiki/Hijab )

From God's War:

Working at the breeding compounds got Kine extra security. All that time at the coast—at the compounds, nose in a book, moving magician-trained bugs across a dish, locked safe behind secure doors at the edge of a soupy sea, her only company the words of the Kitab and the violently conservative women she shared her days with—it was no wonder Kine had come back wearing a hijab to mark her as one of the fundamentalist followers of the Kitab, the Kitabullah.