Rubiconnoun
uk/ˈruː.bɪ.kɒn//ˈruː.bɪ.kən/us/ˈruː.bɪ.kɑːn/cross the Rubicon
to do something that you cannot later change and will strongly influence future events:
Most EU states have crossed the Rubicon and adopted the euro.
Thesaurus: synonyms and related words
Not able to be changed
- a leopard can't/doesn't change its spots idiom
- be no hard and fast rules idiom
- burn your boats/bridges idiom
- congenital
- continuity
- fixed
- fixity
- hard line
- hard line
- immutable
- incurable
- irredeemable
- irreducible
- irremediable
- irreparable
- irretrievable
- ossify
- stuck
- uncompromising
- what's done is done idiom
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