What is the meaning of Regen?

Clipping of regeneration.

A regenerative radio receiver.

Short for regenerative braking.

Clipping of regenerate..

rain

inflection of regenen:

  1. first-person singular present indicative
  2. (in case of inversion) second-person singular present indicative
  3. imperative

first-person singular present indicative

(in case of inversion) second-person singular present indicative

imperative

inflection of rijgen:

  1. plural past indicative
  2. plural past subjunctive

plural past indicative

plural past subjunctive

to move (a small amount or unconsciously)

to move (intransitive), to stir

to be active doing something, occupying oneself

to budge, to become noticeable

to rain

rain

Soft mutation of rhegen.

Source: wiktionary.org