Breakdown of Tämä on tutkimaton reitti, jonne toinen tutkija ei koskaan päässyt.
tämä
this
olla
to be
ei
no / not (en, et, ei, emme, ette, eivät)
koskaan
never / ever
Questions & Answers about Tämä on tutkimaton reitti, jonne toinen tutkija ei koskaan päässyt.
Why does the sentence use jonne instead of minne?
In standard written Finnish, when a relative pronoun refers back to a specific physical noun (like reitti, "route"), you must use a form of joka. Since we need a destination case here, we use jonne (to which/where). Minne is a form of mikä and is strictly reserved for questions or for referring to whole clauses and abstract extremes, even though you might frequently hear it used for locations in casual spoken Finnish.
Could I use johon instead of jonne here?
Yes, johon (the standard illative case of joka) is perfectly correct and means "into which". However, jonne is a special locational relative adverb that emphasizes a physical destination. Because a route is a physical place you travel to, jonne sounds very natural and specific.
What dictates the "to where" direction of jonne in this sentence?
The verb päästä (to manage to get/reach). In Finnish, verbs of arriving, finding, or ending up govern "destination" cases (illative or allative) rather than "location" cases (inessive or adessive). Since the researcher didn't manage to get to the route, the relative pronoun must be in a destination form (jonne), not a static location form like jossa (in which).
How is the word tutkimaton formed?