shom.rah denotes a guard set over the speaker's lips in a prayer for watched speech.

The attested use names a guard placed over the speaker's lips, within a prayer for restraint over speech.

1. A guard over the lips · dominant

   In Psalm 141:3, the feminine singular absolute noun occurs in the request to set something upon the speaker's lip; the APB renders the clause, "Set a guard, O LORD, upon my lip."

   Psalm 141:3

In the Anselm Project Bible: In Psalm 141:3, the APB presents the clause as "Set a guard, O LORD, upon my lip," followed by a request to watch over the door of the lips. The verse is read as a whole.