συγχαίρειν
From LSJ
Ἢ μὴ ποίει τὸ κρυπτὸν ἢ μόνος ποίει → Aut occulendum nil patra, aut solus patra → Tu nichts Verborgnes oder tue es allein
Greek > English (Woodhouse Verbs Reversed)
(see also συγχαίρω): in joy, rejoice with another, sympathise with in joy, sympathise with