συντονία
μούνη γὰρ ἄγειν οὐκέτι σωκῶ λύπης ἀντίρροπον ἄχθος → I have no longer strength to bear alone the burden of grief that weighs me down, I no longer have the strength to hold up alone the weight of grief that pushes against me, I no longer have the strength to counterbalance alone the weight of grief that acts as counterweight, I have no longer strength to balance alone the counterpoising weight of sorrow
English (LSJ)
ἡ,
A tension, of the body or its organs, Hp.Acut.(Sp.) 29, Pl.Ti.84e, Arist.HA540a6, al., Thphr.Lass.7, Gal.6.174, 7.789; ῥώμη ἢ σ. Id.6.154. 2 tension of mind, intense application or exertion, opp. ἄνεσις, Arist.Pol.1341b41, Rh.1370a12; σ. ψυχῆς πρὸς τὸ καταμαθεῖν Pl.Def.413d. II intensity, φλεγμονῆς Hp.Prog.6 (interpol. in 2 codd., om. Kühl.); φορᾶς Epicur.Ep.2p.45U. III agreement, τῶν οὐρανίων πρὸς τὰ ἐπίγεια Chrysipp.Stoic.2.172.