严紧

chuāng hu hú de hěn yán jǐn

窗户糊得很严紧。

The windows are tightly sealed.

píng kǒu fēng de yán jǐn

瓶口封得严紧。

The bottle is closed very tightly.

duì xué sheng men yán jǐn

对学生们严紧

be strict with students

guǎn de yán jǐn xiē

管得严紧些

manage more strictly

xià lìng yán jǐn sōu chá xiōng shǒu

下令严紧搜查凶手。

Make the strictest search for the murderer.