This is not a verb, it is considered an adverb and it is a sepearable part of teloorgaan:
- Het ging door deze storm teloor - It perished due to this storm
Etymologically it comes from the preposition te and a no longer extant noun loor related to verliezen and cognate to Eng. loss. Jcwf 05:00, 1 July 2009 (UTC)