Meaning of dāi:
呆
foolish; stupid; expressionless; blank; stupid (variant of 呆[dai1]); blank (variant of 呆[dai1])
Tā de yàngzi kàn qǐlái yǒudiǎn dāi.
他的样子看起来有点呆。
He looks a bit foolish.
Xuéshēng tīng dào zhège xiāoxi hòu, liǎn shàng xiǎnde hěn dāi.
学生听到这个消息后,脸上显得很呆。
After hearing the news, the student looked very blank.
tā kàn qǐ lái yǒu diǎn er dāi.
他看起来有点儿呆。
He looks a bit stupid.
Tā zhàn zài nàlǐ yī liǎn fā dāi.
他站在那里一脸发呆。
He stood there with a blank look on his face.
to stay (variant of 待[dai1])
Tā juédìng zài jiālǐ dāi yītiān.
他决定在家里呆一天。
He decided to stay at home for a day.