Hurdle noun Definition: something that makes progress challenging Synonyms: barrier, problem, drag Antonyms: incentive, advantage, aid, assistance Based on the thesaurus entry and the context of the sentence, use the drop-down menus to choose the best synonym for "hurdle" in each sentence. Use the online dictionary to check the definitions of the synonyms. The runners passed over each hurdle in a flash. The largest hurdle in my plan to buy a car was lack of money.

the answer to this is:
1.barrier
2.problem