Abbott-Smith Manual Greek Lexicon
συν-ήδομαι (G4913)
1 * συν-ήδομαι to rejoice together ; c. dat., to rejoice with or in : τ. νόμῳ τ. θεοῦ , Ro 7:22 (v. Lft., Notes , 304).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain