The spelling of the word "crebrous" can be confusing due to the presence of the letter "b" in the middle of the word. However, according to the International Phonetic Alphabet (IPA), the correct pronunciation of this word is /ˈkriːbrəs/. The "b" is pronounced as a voiced bilabial plosive, which means that the lips come together to produce a sound, while the vocal cords vibrate. "Crebrous" means full of holes or perforations, and is a rarely used term in English.
The word "crebrous" does not have a well-established etymology as it is considered to be quite rare and obscure. It is not listed in most prominent etymology dictionaries. However, it is believed to have Latin origins, derived from the Latin word "creber" which means "frequent" or "repeated". "Crebrous" is an adjective form of "creber". Unfortunately, there isn't much more information available about the specific origins or history of this word.