Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveeren » passiveeeren, massiveeren, passiveneeren, passieren, passiverer, passivierende
passiveeeren » passiveeeeren, massiveeeren, passiveneeeren, passieren, passiverer
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
massigeren » massiger, massigen, massivere

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (passiv OR (passion OR (massigeren OR (passiveeren OR (passiveeeren OR passivieren))))).
• Adding a wildcard symbol may retrieve word variants: (passiv or (passion or (massigeren or (passiveeren or (passiveeeren or passivieren)))))*.