微睡 is read as びすい (bisui) and means doze.
びすい
bisui
まどろみ
doze
まどろむ
to doze (off)
びみょう
not great
ほほえむ
to smile
びしょう
smile
びねつ
slight fever
びせいぶつ
microbe
microscopic
びどう
slight movement
びりょう
minuscule amount
びさい
minute
かすか
poor