Thayer's
STRONGS NT 4880: συναποθνῄσκωσυναποθνῄσκω: 2 aorist
συναπεθανον;
to die together; with the dative of the person
to die with one (Sir. 19:10, and often in Greek authors from
Herodotus down):
Mark 14:31; namely,
ὑμᾶς ἐμοί,
that ye may die together with me, i. e. that my love to you may not leave me even were I appointed to die,
2 Corinthians 7:3; namely,
τῷ Χριστο (cf.
Winer's Grammar, 143 (136)), to meet death as Christ did for the cause of God,
2 Timothy 2:11.