buibuin.
/ˌbuːɪˈbuːi/, U.S. /ˌbuiˈbui/, East African English /ˌbuiˈbui/ East African.
A traditional garment worn by Muslim women in East Africa, typically a long black gown with a black head covering that leaves only the eyes or face exposed.
ΚΠ
1929 Africa 2 157 Most native women are accustomed to wear a buibui (a simple sheet wound one and a half times around the body, stretching from the middle of the calves to the armpits, and tucked in on the left side over the breast).
1978 J. Updike Coup iii. 119 Perhaps she had been about to go out, for she was muffled head to toe in a dull black buibui with the addition of a face-veil that covered even her brow.
2017 Sunday Nation (Kenya) (Nexis) 26 Apr. Anyone in Nairobi who often crosses Kenyatta Avenue at the junction with Kimathi Street late in the evening must be familiar with a woman in a trademark black buibui.
This is a new entry (OED Third Edition, June 2022).
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n.1929