Pousse

pousser = to push

Obviously, a lot of applications of this word, so I'll just throw in a couple of examples:
tu m'as poussé! = you pushed me!
faut pas pousser = don't overdo it, don't exagerate
à la va comme je te pousse = any old how. Literally, "going as I push you"
un pousse-café = an after-dinner liqueur
un pousse-pousse = a rickshaw