συνακολουθέωsynakolouthéō

to follow along with, accompany: with dative of person, Mark 14:51, Luke 23:49; followed by μετά, with genitive of person, Mark 5:37.

Greek (New Testament) · G4870

Same root

σύνsýn · G4862with or together (but much closer than G3326 (μετά) or G3844 (παρά)), i.e. by association, companionship, process, resemblance, possession, instrumentality, addition, etc.
ἀκολουθέωakolouthéō · G190properly, to be in the same way with, i.e. to accompany (specially, as a disciple)

Where it appears

Appears 3 times in the Bible.

Mark 5:37 Then Jesus stopped the crowd and wouldn’t let anyone go with him except Peter, James, and John (the brother of James).
Mark 14:51 One young man following behind was clothed only in a long linen shirt. When the mob tried to grab him,
Luke 23:49 But Jesus’ friends, including the women who had followed him from Galilee, stood at a distance watching.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.