A.sound in answer, echo, respond, “ὑπὸ δ᾽ ἤχεεν οὔρεα μακρά” Hes.Th.835; “ἔρρηξε δ᾽ αὐδήν, ὥσθ᾽ ὑπηχῆσαι χθόνα” E.Supp.710; ὥστε τὴν κώμην ὑπηχεῖν so that the village rang again, Pherecr.10 (troch.); θερινὸν ὑπηχεῖ τῷ τῶν τεττίγων χορῷ echoes summer-like with the cicada-choir, Pl.Phdr.230c; of musical strings, Arist.Pr.921b15: metaph., with neut. Adj., “ἄλλο ὑ.” Luc.DMar.1.4; “σαθρὸν καὶ ἀγεννές” Plu.2.64e.
2. prompt, suggest, esp. of an inner voice, Ph.1.599,645,659,692, 2.12; καθάπερ ὑποβολέως ἔνδοθεν ὑπηχοῦντος ib.416.