take someone's word for it
US /teɪk ˈsʌm.wʌnz wɜrd fɔr ɪt/
UK /teɪk ˈsʌm.wʌnz wɜrd fɔr ɪt/

1.
누구의 말을 믿다, 누구의 말을 그대로 받아들이다
to believe that what someone says is true, without checking or proving it
:
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I haven't seen the report, but I'll take your word for it that it's accurate.
보고서는 못 봤지만, 정확하다는 당신의 말을 믿을게요.
•
He said he finished all his homework, and I had to take his word for it.
그는 숙제를 다 했다고 말했고, 나는 그의 말을 믿을 수밖에 없었다.