レン, つら.なる, つら.ねる, つ.れる, づ.れ, ずれ, つれ, むらじ, れ
take along, lead, join, connect, party, gang, clique
JLPT3 G4 S10 F30
車 here an abbreviated form# of 陣 (military vehicles in tight rows) + 辵 movement → rows of military vehicles on the move → *be/put in a row*; *be lined up*; *range*; *arrange*; *link* → *be involved*; *be accompanied/taken*; *companion*; *regiment* → *attend* (← be one of many attendees).
[Full Kanji Etymology List]