strengthen, τροφὴ ῥώννυσι Hp. l.c.; ῥ. τὰν ψυχὰν ποτʼ (πρὸς) ἀλκάν Ti.Locr. 103b; ὁρμάν ib. e; τὰς πόλεις Plu. Per. 19: but
mostly in pf. Pass. (with pres. sense) ἔρρωμαι, and plpf. ἐρρώμην (as impf.):—have strength or might, γέροντές ἐσμεν κοὐδαμῶς ἐρρώμεθα E. Heracl. 636; ἐρρῶσθαι τὴν ψυχήν X. HG 3.4.29; so ἐρρώσθη χρήμασιν Plu. Publ. 23.
to be eager, enthusiastic, glossed by προθυμεῖσθαι, Cratin. 411; ἔρρωντο ἐς τὸν πόλεμον Th. 2.8, cf. 8.78, 4.72: c. inf., to be eager to do, ἔρρωτο πᾶς ξυνεπιλαμβάνειν Id. 2.8, cf. Lys. 13.31, Pl. Smp. 176b.
to be in good health, Th. 7.15: freq. in imper. ἔρρωσο, farewell, the usual way of ending a letter, as in X. Cyr. 4.5.33, and at the close of Pl. Ep. 1, 2, and 10; ἔρρωσο πολλά Men. Georg. 84; ἔρρωσθε Id. Pk. 50; also φράζειν τινὶ ἐρρῶσθαι Pl. Phd. 61b, D. 18.152, 19.248; εἰ ἔρρωσαι . . καλῶς ἂν ἔχοι, ἐρρώμεθα δὲ καὶ αὐτοί PPetr. 2p.27 (iii B.C.); εἰ ἔρρωσθε εὖ ἂν ἔχοι IG 7.413 (Oropus, Senatus consultum, i B.C.), cf. SIG 768 (Epist. Aug.).
freq. in part. ἐρρωμένος (q.v.).