undergoon Academic Word Listalso onCEFR Upper intermediate (B2)? CEFR Advanced (C1)? يعاني,يمرّ ب undergo undergo(verb) يعاني,يمرّ ب undergoes undergoes(verb) يعاني,يمرّ ب undergoing undergoing(verb) يعاني,يمرّ ب undergone undergone(verb) underwent underwent(verb) يتعهد,يلتزم Forms verb undergo undergoes undergoing undergone underwent