kestävimpänä
kestävimpänä is the Finnish superlative form of the adjective kestävä, which translates to durable, sustainable, or lasting. Therefore, kestävimpänä refers to something that is the most durable, the most sustainable, or the most lasting among a group of similar items or concepts.
In practical terms, when something is described as kestävimpänä, it implies it possesses the highest degree
The concept of kestävimpänä is often used in discussions related to environmentalism, economics, and product design.