1 noun person, resource, etcshe was always our mainstayba ise i gcónaí an crann taca a bhí againntourism is the economic mainstayis í an turasóireacht bunchloch an gheilleagair, is í an turasóireacht crann taca an gheilleagair2 noun SAIL, NAUT on boatthe mainstaystagh an chrainn mhóir, an stagh mór