ḳéṣar in LS 383 (attested in Müller 1905:179) was identified by the language consultants as ḳö́ẓ̂ar.
“In the speech of our informants the main term for night is ḥte, whereas ľéľhe is restricted to the expression be-ľéľhe ‘during the night’, ‘in the night-time’” (Kogan 2015:514)
This is an impersonal verb used in 3 sg. f. only (sometimes with mέsɛ as direct object)