ὀμφαλώδης
From LSJ
ἢ δεῖ σιωπᾶν ἢ λέγειν τὰ καίρια → you should either keep silence or make timely remarks (Menander)
English (LSJ)
ες,
A = ὀμφαλοειδής, Arist.HA550a21, GA752b2.
German (Pape)
[Seite 343] ες, = ὀμφαλοειδής, Arist. gener. anim. 3, 2.
Greek (Liddell-Scott)
ὀμφᾰλώδης: -ες, συνῃρ. ἀντὶ ὀμφαλοειδής, Ἀριστ. π. τὰ Ζ. Ἱστ. 5. 18, 6, π. Ζ. Γεν. 3. 2, 6.