quitter
Longman Dictionary of Contemporary English 5++LDOCE 5++quit·ter /ˈkwɪtə $ -ər/ noun [countable] informalSTOP DOING something someone who does not have the determination or courage to finish something that is difficult 遇到困难就放弃的人，半途而废的人
Examples from the Corpus
quitter• In nearly 3,000 years with this company, I have never been known as a quitter.• I'm not a quitter, but this job is starting to affect my health.• But President Tucker was not a quitter, and he got right back on the horse.• But these were early days, and Shelley wasn't a quitter.• I was a coward, a damned quitter.• Even Clinton's enemies have to admit that, with the bruising he has taken, he is no quitter.quit·ter nounChineseSyllable
not does determination who the Corpus have someone
quitter
quit‧ter /ˈkwɪtə $ -ər/
noun [countable]
informal someone who does not have the determination or courage to finish something that is difficult
quit‧ter /ˈkwɪtə $ -ər/
noun [countable]informal someone who does not have the determination or courage to finish something that is difficult