- 来复枪 láifùqiāng riflerifle; a type of firearm with a rifled barrel, from the English loanword 'rifle'
- 来复线 láifùxiàn riflingspiral grooves on the inside of a gun barrel that make a bullet spin; also called [[膛线|膛線|tang2 xian4]]
- 来复日 láifùrì Sundayday of the week occurring between Saturday and Monday, associated with a recurring seven-day cycle