tiefste
Tiefste is the superlative form of the German adjective tief, meaning deep. It is used to denote the greatest depth or extent of something. When the adjective accompanies a definite article or determiner, it takes the ending -ste, as in der tiefste Punkt, die tiefste Höhle, das tiefste Meer. As an adverb, the corresponding form is am tiefsten, for example: Der See ist am tiefsten im Norden. Additionally, das Tiefste can appear as a nominalized noun meaning “the deepest part” in a given context.
In practical use, tiefste generally translates to “deepest” in English. The deepest known point of the oceans