συνᾴδω,
={συναείδω} (which see), sing with or together, accompany in a song, μετά τινων τὸν παιᾶνα [[ 4th c.BC: Aeschines Orator 2.163; σ. παιᾶνά τινι [prev. work]162; σ. ᾠδάν 5th-6th c.BC: Aristophanes Comicus “Aves” 858 (Lyric poetry)] Refs 5th c.BC+]; also of an instrument, [[ 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Alcibiades” 2: _metaphorically_, [prev. author] 2.55d. ] Refs 1st c.AD+]
__2 generally, to be in accord with, agree with, τινι [[ 5th-6th c.BC: Aristophanes Comicus “Lysistrata” 1088, 5th-6th c.BC: Plato Philosophus “Phaedo” 92c, etc.; ταὐτόν [prev. author] “R.” 432a; ἐν μακρῷ γήρᾳ ξ. τινί 5th c.BC: Sophocles Tragicus “Oedipus Tyrannus” 1113 ] Refs 5th c.BC+]: absolutely, to be in unison, opposed to διᾴδειν, [[ 1st c.AD(?): Heraclitus 10, compare 5th-6th c.BC: Plato Philosophus “Protagoras” 333a. ] Refs 5th c.BC+]
__II transitive, sing of or celebrate together, τινα [[ 3rd c.BC: Theocritus Poeta Bucolicus 10.24. ] Refs 3rd c.BC+]