French word pourboire comes from French pour, French boire ((ambitransitive) to drink.)

Detailed word origin of pourboire

Dictionary entry	Language	Definition
pour	French (fra)	For (when followed by a noun or pronoun). To (when followed by a verb at the infinitive).
boire	French (fra)	(ambitransitive) to drink.
pourboire	French (fra)	Tip (extra money given to e.g. a waiter for appreciation).

Words with the same origin as pourboire