The foot that is in front when walking or standing

Used to indicate that one action happened just before another; almost always used in the pattern qián jiǎo ... 后脚 hòu​jiǎo meaning "no sooner... than..." or "one moment..., the next...".

The front limbs of an insect or four-legged animal

The pincer or claw of a crustacean or arachnid; a front appendage