challenging
动词 challenge:
take exception to
同义词:challenge, dispute, gainsay
issue a challenge to
同义词:challenge
ask for identification
同义词:challenge
raise a formal objection in a court of law
同义词:challenge, take exception
形容词 challenging:
requiring full use of your abilities or resources
同义词:ambitious
stimulating interest or thought
disturbingly provocative
同义词:intriguing