συμπάρειμι
From LSJ
Τούτῳ τῷ λόγῳ χρήσαιτο ἄν τις ἐπ' ἐκείνων τῶν ἀνθρώπων οἳ παραδόξως ἀλαζονεύονται, μηδὲ τὰ κοινὰ τοῖς ἀνθρώποις ἐπιτελεῖν δυνάμενοι → One would use this fable for those who give themselves unreasonable airs, but can't handle everyday life (Aesop 40)
English (LSJ)
(εἰμί
A sum) to be present also or at the same time, Hp.VM17, And.1.12, X.Lac.2.2, 12.3, etc.; freq. in Pap., PSI5.509.8 (iii B.C.), etc.; of a desire, Sor.1.38; of planets, occupy a position together, Vett.Val.60.21. 2 stand by, come to help, τινι X.HG4.6.1; ἐν ἔργοις Phld.Piet.37; of an advocate, D.24.158; act as one's representative, PRyl.120.3 (ii A.D.), etc.
συμπάρ-ειμι, (εἶμι
A ibo) march beside together, impf. συμπαρῄει, X.HG2.1.28, Aeschin.2.111.