Strong's #7867: siyb (pronounced seeb)

a primitive root; properly, to become aged, i.e. (by implication) to grow gray:--(be) grayheaded.

Brown-Driver-Briggs Hebrew Lexicon:

ׂ

śı̂yb

1) (Qal) to be hoary, be gray

Part of Speech: verb

Relation: a primitive root

Usage:

This word is used 2 times:

 

1 Samuel 12:2: "before you: and I am old and grayheaded; and, behold, my sons are with you: and I"
Job 15:10: "With us are both the grayheaded and very aged men, much elder than thy father."