double-cross - definition and synonyms

verb [transitive] 

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present tense
I/you/we/theydouble-cross
he/she/itdouble-crosses
present participledouble-crossing
past tensedouble-crossed
past participledouble-crossed
  1. to cheat someone, usually when doing something illegal or planning to cheat someone else together

derived word

double cross

noun [countable]
singulardouble cross
pluraldouble crosses