| 黑 | hēi xiá zi | (airplane) black box | 
| 黑 | Hēi | abbr. for Heilongjiang province 黑龙江 | 
| 黑 | hēi | black / dark / sinister / secret / shady / illegal / to hide (sth) away / to vilify / (loanword) to hack (computing) | 
| 匣 | xiá | box | 
| 匣 | xiá zi | small box | 
| 子 | zǐ | son / child / seed / egg / small thing / 1st earthly branch: 11 p.m.–1 a.m., midnight, 11th solar month (7th December to 5th January), year of the rat / viscount, fourth of five orders of nobility 五等爵位 / ancient Chinese compass point: 0° (north) / subsidiary; subordinate; (prefix) sub- | 
| 子 | zi | noun suffix, as in 椅子 "chair" |