- 私底下 sīdǐxia privatelyin private, secretly, or confidentially; away from public view
- 天底下 tiāndǐxia in the worldin this world; under the sun; everywhere on earth
- 眼皮底下 yǎnpídǐxia under one's nosein front of one's eyes; right under one's nose
- 眼皮子底下 yǎnpízidǐxià at the momentpertaining to the current or immediate situation
- 大树底下好乘凉 dàshùdǐxiàhǎochéngliáng patronagefiguratively refers to benefiting by proximity to an influential person or a powerful organization
- 眼底下 yǎndǐxia nearbyright in front of one's eyes; under one's nose
- 笔底下 bǐdǐxià writing skillthe ability to write; writing skill
