schnellsten
Schnellsten is the superlative form of the German adjective schnell, meaning fast or quick. It marks the highest degree of speed within a defined group or comparison. In English, it translates to “fastest” or “quickest” depending on context. The form is used in attributive position with a definite determiner or in phrases that denote the fastest among several items, for example: die schnellsten Autos (the fastest cars) or die schnellsten Zeiten (the fastest times).
Grammatically, schnellsten is the plural, attributive superlative form. In singular, the corresponding forms are der schnellste
Etymology and usage notes: schnell derives from Old High German snell, with the superlative suffix -sten forming