| 1 | 牢固 | 牢固 | láo gù | lao2 gu4 | firm; secure | | |
| 2 | 牢牢 | 牢牢 | láo láo | lao2 lao2 | firmly; safely | | |
| 3 | 牢 | 牢 | láo | lao2 | firm; sturdy; fold (for animals); sacrifice; prison | | |
| 4 | 牢头 | 牢頭 | láo tóu | lao2 tou2 | jailer (old) | | |
| 5 | 牢实 | 牢實 | láo shi | lao2 shi5 | solid; strong; firm; secure | | |
| 6 | 牢子 | 牢子 | láo zǐ | lao2 zi3 | jailer (old) | | |
| 7 | 牢狱之灾 | 牢獄之災 | láo yù zhī zāi | lao2 yu4 zhi1 zai1 | imprisonment | | |
| 8 | 牢狱 | 牢獄 | láo yù | lao2 yu4 | prison | | |
| 9 | 牢友 | 牢友 | láo yǒu | lao2 you3 | inmate; cellmate | | |
| 10 | 牢什子 | 牢什子 | láo shí zi | lao2 shi2 zi5 | variant of 劳什子 | | |
| 11 | 牢骚 | 牢騷 | láo sāo | lao2 sao1 | discontent; complaint; to complain | | |
| 12 | 牢落不群 | 牢落不群 | láo luò bù qún | lao2 luo4 bu4 qun2 | to keep oneself aloof (idiom) | | |
| 13 | 牢笼 | 牢籠 | láo lóng | lao2 long2 | cage; trap (e.g. basket, pit or snare for catching animals); fig. bonds (of wrong ideas); shackles (of past misconceptions); to trap; to shackle | | |
| 14 | 牢靠妥当 | 牢靠妥當 | láo kào tuǒ dàng | lao2 kao4 tuo3 dang4 | reliable; solid and dependable | | |
| 15 | 牢靠 | 牢靠 | láo kào | lao2 kao4 | firm and solid; robust; reliable | | |
| 16 | 牢记在心 | 牢記在心 | láo jì zài xīn | lao2 ji4 zai4 xin1 | to keep firmly in mind (idiom) | | |
| 17 | 牢记心头 | 牢記心頭 | láo jì xīn tóu | lao2 ji4 xin1 tou2 | to keep firmly in mind (idiom) | | |
| 18 | 牢记 | 牢記 | láo jì | lao2 ji4 | to keep in mind; to remember | | |
| 19 | 牢房 | 牢房 | láo fáng | lao2 fang2 | jail cell; prison cell | | |
| 20 | 牢愁莫遣 | 牢愁莫遣 | láo chóu mò qiǎn | lao2 chou2 mo4 qian3 | to be chronically melancholic (idiom) | | |
| 21 | 牢不可破 | 牢不可破 | láo bù kě pò | lao2 bu4 ke3 po4 | firmly unbreakable | | |