סב

Etymology 1
From "ancestor; elder; grandfather"; related to native Hebrew.

Noun

 * 1) An elderly man; an aged or old man.
 * 2) A grandfather: the father of a parent.
 * 3) An old wise man.

Usage notes

 * Though historically the primary sense was “old man” or “old wise man” (in which sense it was used also as an adjective), in modern use the primary sense is “grandfather”.
 * This noun is a bit formal today; the more colloquial term for a grandfather is.

Etymology 2
From the root.