例文（１級）：connivance，exertion

His success in the job was achieved through the connivance of his
colleagues, who turned a blind eye to his dishonest practices.
(彼の成功は、同僚たちが彼の不正行為を見逃すことで達成された。)

Despite the physical exertion required, she pushed herself to complete
the marathon and crossed the finish line with a sense of
accomplishment. (彼女は必要な体力的な努力にもかかわらず、自分を追い込んでマラソンを完走し、達成感を抱いた。)

connivance： （悪事の）見逃し、（犯罪の）黙認
exertion： 努力、骨折り