צָפַף (tsâphaphtsaw-faf'verbchirp)
[Heb] צָפַף ETCBC: צפף‎ (verb|whisper) OSHL: r.dm.aa TWOT: 1957 GK: H7627 Greek: ἀντέπω, ἀσθενέω, γῆ, φωνέω
Derivation: a primitive root;
Strong's: to coo or chirp (as a bird)
KJV: chatter, peep, whisper.