Question

to ____ means to be present throughout, to exist in every part of. if you have too many cats, the horrible smell of cat pee will ____ your house. spell the word:

Explanation:

The description "to be present throughout, to exist in every part of" matches the meaning of the word "pervade". In the context of the second - sentence, the smell of cat pee spreading throughout the house also fits the usage of "pervade".

Answer:

pervade