Vine's Expository Dictionary: View Entry
TDNT Reference: 9:359,1298
συγχαίρω synchaírō, soong-khah'-ee-ro; from G4862 and G5463; to sympathize in gladness, congratulate:—rejoice in (with).
The KJV translates Strong's G4796 in the following manner: rejoice with (6x), rejoice in (1x).
to rejoice with, take part in another's joy
to rejoice together, to congratulate
Strong's Number G4796 matches the Greek συγχαίρω (sygchairō),
which occurs 7 times in 7 verses
in the TR Greek.