Those who engage in advertising know of this expression, whose concept is the ability of a sound, an image a voice or a fact, to be captured by human memory for a long time. A notice in a graphic medium is pregnante when its design captures our attention and manages to be located in the "Top of mind" of memories. But it is also pregnante a song associated with a pleasant time of life or not. Pregnar would be the action of endowing a property thing to be pregnant.
I do not know the meaning of PREGNAR, it is to find it and don't see it, but pure logic only, must have relationship with PERMEATE and weight that if have meaning in the dictionaries. usual. I think it could be something as: the ability of a substance to another requesting to attend. or ability of something or someone respond or go to the request for another thing or person.