erschließen

Etymology
From.

Verb

 * 1) to exploit or develop
 * 2) to tap
 * 3) to infer or deduce
 * 4) to extrapolate

Usage notes

 * Before the 1996 German spelling reform, the past tense was conjugated as erschloß, erschlossest/erschloßt, erschloß, erschlossen, erschloßt, erschlossen, while the reformed spellings use erschloss- consistently.