French word aller comes from French suppletive

Detailed word origin of aller

Dictionary entry	Language	Definition
suppletive	French (fra)
aller	French (fra)	(intransitive) to go. (when followed by an infinitive verb) to be going (to); will soon; forms a near-future tense. To be (feeling). To go well with (clothes, colors, etc.) Outward trip; journey out; trip away (implying not returning).

Words with the same origin as aller