| hū | suddenly |
| 忽 | surname Hu |
| 忽上忽下 | to fluctuate sharply |
| 忽冷忽热 | sometimes hot and sometimes cold; blow hot and cold in turn; by fits and stars; Fever alternates with chills |
| 忽发奇想 | suddenly have a strange idea |
| 忽哨 | to whistle (with fingers in one's mouth) nowadays written 呼哨 |
| 忽地 | suddenly |
| 忽左忽右 | have it both ways; had it both ways; has it both ways |
| 忽布 | hops |
| 忽微 | minuscule quantity minor matter |
| 忽必烈 | Khubilai Khan (1215-1294), grandson of Genghis Khan 成吉思汗, first Yuan dynasty emperor, reigned 1260-1294 |
| 忽忽 | fleeting (of quick passage time) in a flash distracted manner |
| 忽忽悠悠 | indifferent to the passing of time careless |
| 忽悠 | to rock to sway to flicker (e.g. of lights reflected on water) |
| 忽明忽暗 | flickering |
| 忽然 | suddenly all of a sudden |
| 忽略 | to neglect to overlook to ignore |
| 忽米 | centimillimetre; centimillimeter |
| 忽而 | sometimes |
| 忽视 | to neglect to ignore |
| 忽闪 | to glitter to gleam to sparkle |