| 1 | 口 | 口 | kǒu | kou3 | mouth; classifier for things with mouths (people, domestic animals, cannons, wells etc); classifier for bites or mouthfuls | | |
| 2 | 口号 | 口號 | kǒu hào | kou3 hao4 | slogan; catchphrase; Classifiers: 个 | | |
| 3 | 口气 | 口氣 | kǒu qì | kou3 qi4 | mouthparts (of animal or insect); tone of voice; the way one speaks; manner of expression; tone | | |
| 4 | 口袋 | 口袋 | kǒu dài | kou3 dai4 | pocket; bag; sack; Classifiers: 个 | | |
| 5 | 口腔 | 口腔 | kǒu qiāng | kou3 qiang1 | oral cavity | | |
| 6 | 口语 | 口語 | kǒu yǔ | kou3 yu3 | colloquial speech; spoken language; vernacular language; slander; gossip; Classifiers: 门 | | |
| 7 | 口头 | 口頭 | kǒu tóu | kou3 tou2 | oral; verbal | | |
| 8 | 口径 | 口徑 | kǒu jìng | kou3 jing4 | caliber; diameter of opening | | |
| 9 | 口吻 | 口吻 | kǒu wěn | kou3 wen3 | tone of voice; connotation in intonation; accent (regional etc); snout; muzzle; lips; protruding portion of an animal's face | | |
| 10 | 口音 | 口音 | kǒu yin | kou3 yin5 | voice; accent | | |
| 11 | 口音 | 口音 | kǒu yīn | kou3 yin1 | oral speech sounds (linguistics) | | |
| 12 | 口子 | 口子 | kǒu zi | kou3 zi5 | hole; opening; cut; gap; gash; my husband or wife; classifier for people (used for indicating the number of people in a family etc); precedent | | |
| 13 | 口令 | 口令 | kǒu lìng | kou3 ling4 | oral command; a word of command (used in drilling troops or gymnasts); password (used by sentry) | | |
| 14 | 口岸 | 口岸 | kǒu àn | kou3 an4 | a port for external trade; a trading or transit post on border between countries | | |
| 15 | 口讷 | 口訥 | kǒu nè | kou3 ne4 | (literary) inarticulate | | |
| 16 | 口角 | 口角 | kǒu jiǎo | kou3 jiao3 | corner of the mouth | | |
| 17 | 口播 | 口播 | kǒu bō | kou3 bo1 | (broadcasting) to speak to the audience; to advertise a product by speaking directly to the audience; endorsement (by a celebrity for a product, delivered orally) | | |
| 18 | 口信 | 口信 | kǒu xìn | kou3 xin4 | oral message | | |
| 19 | 口彩 | 口彩 | kǒu cǎi | kou3 cai3 | complimentary remarks; well-wishing | | |
| 20 | 口才 | 口才 | kǒu cái | kou3 cai2 | eloquence | | |
| 21 | 口不择言 | 口不擇言 | kǒu bù zé yán | kou3 bu4 ze2 yan2 | to speak incoherently; to ramble; to talk irresponsibly | | |
| 22 | 口不应心 | 口不應心 | kǒu bù yìng xīn | kou3 bu4 ying4 xin1 | to say one thing but mean another; to dissimulate | | |
| 23 | 口臭 | 口臭 | kǒu chòu | kou3 chou4 | bad breath; halitosis | | |
| 24 | 口足目 | 口足目 | kǒu zú mù | kou3 zu2 mu4 | Stomatopoda, order of marine crustaceans (whose members are called mantis shrimps) | | |
| 25 | 口碑流传 | 口碑流傳 | kǒu bēi liú chuán | kou3 bei1 liu2 chuan2 | widely praised (idiom); with an extensive public reputation | | |