Challenging unchanged Synonyms

Definitions for Challenging


  • (adjective) requiring considerable physical or mental effort
  • (adjective) requiring much time, effort, or careful attention
  • (adjective) requiring full use of your abilities or resources

Synonyms for phrase

CU abbreviation

CU is an abbreviation for Challenging Unchanged
What does CU stand for?
CU stands for "Challenging Unchanged"

Definitions for Unchanged