Khidr primarily evokes screening and enclosure. In this verse it identifies a protected inner space used during travel. Treating it only as a room in a permanent house would obscure the next verse, with its ghabīṭ and the movement of a camel.
ʿUnayzah is the name or appellation of the woman in the scene; the classical commentary reports differing identifications. What matters for reading the poem is that the speaker evokes a particular remembered encounter.
ExpressionUse in this verse
Al-khidrA screened space or the interior of the litter
ʿUnayzahName or appellation of a particular woman
DakhaltuThe poet’s first-person report of entry