Old Testament Hebrew Lexical Dictionary
Strong's #3511 - כְּאֵב
1232) bk (כב KB) AC: ? CO: Star AB: ?: The pictograph k is a picture of the palm of the hand and represents a covering, the b is a picture of a tent. Combined these mean "covering of the tent". The black goat hair fabric used for the roof of the tent allows some light through giving the appearance of stars overhead. When it rains the hair fibers swell sealing all of these holes.
Jeff Brenner, Ancient Hebrew Research Center Used by permission of the author.
כְּאֵב m. (Tzere impure) constr. כְּאֵב (Isaiah 65:14), pain of body, Job 2:13, 16:6 and sorrow of mind (with the addition of לֵב), Isa. loc. cit. (Germ. Herzleid).
the Second Week after Easter