indissoluble
🇺🇸
/ˌɪndɪˈsɑːljəbl/
🇬🇧
/ˌɪndɪˈsɒljəbl/
something that cannot be broken or separated
Their bond was so strong that it became an indissoluble partnership.
彼らの絆はあまりにも強く、解消できないパートナーシップとなった。