加入(俱乐部、组织等)，成为会员，入会，准入，订阅，隶属，签署(如条约)，投保(保险)

1. joining (a club, organization, etc.), becoming a member, entry, admission, subscription, affiliation, signing (e.g. a treaty), taking out (insurance)

noun (common) (futsuumeishi) intransitive verb noun or participle which takes the aux. verb suru