A primitive root; properly, to become aged, i.e. (by implication) to grow gray -- (be) grayheaded.
H7867. sib
שִׂיב verb be hoary (Late Hebrew שֵׂיבָה old age; Assyrian šêbu, aged man; Arabic () become hoary, Ethiopic (in derivatives); Aramaic סִיב be old; grow old, grey hair); —
Qal Perfect1singular וָשַׂ֫בְתִּי זָקַנְתִּי 1 Samuel 12:2; Participle שָׂב Job 15:10 (+ יָשִׁישׁ aged).