(literary) they

firm, strong / stable, secure

firmness, strength / stability, security

union; alliance

to ally

past tense and perfective aspect of 結ぶ (musubu) [godan]

tie (a string, rope, sash, etc.) / connect / be bound (by love, friendship, etc.) / enter a contract, form an alliance / wrap up, wind up / conclude, end

to bear fruit

ally (a nation united to another by treaty or league)

ally