linchpinned

Verb

linchpin (third-person singular simple present linchpins, present participle linchpinning, simple past and past participle linchpinned)

1. (ambitransitive) To adopt as, or serve as, a central cohesive source of stability and security.
   • The poems turn fear of individual death into an audit of the costs of an aristocratic status quo which is linchpinned by a monarchy indulging in paradigms of social redress that have become cosmetic, opportunities for self-display rather than genuine justice.2013, Christine Chism, Alliterative Revivals, page 238

See all 3 meanings of linchpin