Lexical Definition

‎סָפַף‎ çâphaph (saw-faf') to stand ^H:V
a primitive root; properly, to snatch away, i.e. terminate; but used only as denominative from ‎סַף‎ (in the sense of a vestibule),

be a doorkeeper.

• to wait at the threshold

1) (Hithpoel) to stand at or guard the threshold

Brown-Driver-Briggs

[‎ספף‎ verb denominative Hithpô`. stand at, or guard, the threshold; — Infinitive construct ‎בָּחַ֫רְתִּי‎ ‎אֱלֹהַי‎ ‎הִסְתּוֺפֵף בְּבֵית‎ Ps 84:11* I choose standing at the threshold in the house of my God.

Brown-Driver-Briggs References