- 黑匣子 hēixiázi black boxThe flight data recorder on an aircraft used to investigate accidents; also called [[黑盒子|黑盒子|hei1 he2 zi5]] in Taiwan
- 话匣子 huàxiázi chatterboxA talkative person or a mouth that won't stop talking; also used to refer to a topic of conversation that someone starts talking about at length.
- 打开话匣子 dǎkāihuàxiázi to open a topicTo start a conversation or find a topic to begin talking
- 火匣子 huǒxiázi cheap coffin(colloquial) a cheap or poorly made small coffin
- 电匣子 diànxiázi radioAn old-fashioned or regional term for a radio; literally "electric box".