| 低能 | dī néng | incapable / incompetent / stupid / mentally deficient |   |
| 力不胜任 | lì bù shèng rèn | not to be up to the task (idiom) / incompetent | |
| 不学无术 | bù xué wú shù | without learning or skills (idiom) / ignorant and incompetent | |
| 望洋兴叹 | wàng yáng xīng tàn | lit. to gaze at the ocean and lament one's inadequacy (idiom) / fig. to feel powerless and incompetent (to perform a task) | |
| 眼高手低 | yǎn gāo shǒu dī | to have high standards but little ability / to be fastidious but incompetent (idiom) | |
| 误人子弟 | wù rén zǐ dì | (of a lazy or incompetent teacher) to hamper students' progress / (of media) to propagate errors / to lead people astray | |
| 𪨊 | sóng | (coll.) semen / (coll.) weak and incompetent | |
| 庸碌无能 | yōng lù wú néng | mediocre and incompetent | |
| 㞞 | sóng | (coll.) semen / weak and incompetent | |
| 吃干饭 | chī gān fàn | (coll.) to be incompetent / useless / good-for-nothing | |
| 问道于盲 | wèn dào yú máng | lit. to ask a blind man the way (idiom) / fig. to seek advice from an incompetent | |
| 望洋兴叹 | wàng yáng - xīng tàn | lit. to gaze at the ocean and lament one's inadequacy (idiom) / fig. to feel powerless and incompetent (to perform a task) | |
| 猪队友 | zhū duì yǒu | (slang) incompetent teammate, coworker etc | |
