ʿārav עָרַב ‘to grow dark’ (Hebrew)

Etymology^?: a primitive root (identical with ʿārav עָרַב ‘to pledge’ through the idea of covering with a texture)
Roots: ערב

ʿārav v
1) to become evening, grow dark
 1a) (Qal) to become evening, grow dark
 1b) (Hiphil) to spend the evening, do at evening