Answer:

joined

AnswerCrossword Clue
JOINEDSigned up for
JOINEDBecame a member
JOINEDNot separated
JOINEDConsolidated.
JOINEDAccompanied.
JOINEDBound together
JOINEDUnited
JOINEDWedded
JOINEDYoked
JOINEDHand in hand
JOINEDConnected
JOINEDPaid the membership fee