vástoinkäymisistään
Väsymisistään is a Finnish term that translates to "from their fatigue" or "due to their weariness." It is a grammatical construction in Finnish, specifically the elative plural of the word "väsymys" (fatigue or weariness). The elative case in Finnish indicates a departure or origin from something, and the plural form signifies that the fatigue or weariness applies to multiple subjects or is a collective experience.
In practice, "väsymisistään" would be used in a sentence to describe the cause or reason for something