Correct spelling for the English word "be use" is [biː jˈuːs], [biː jˈuːs], [b_iː j_ˈuː_s] (IPA phonetic alphabet).
The term "be use" does not have a specific etymology as it seems to be a combination of two separate words: "be" and "use".
"Be" is a verb that originates from Old English and has roots in Proto-Germanic. It has retained its form throughout the centuries and is still used as an auxiliary verb in various contexts, indicating identity, existence, or a passive voice.
"Use" originates from Old French "user" and Latin "uti" which means "to employ, make use of". It entered the English language in the 13th century and has since been used to refer to the act of utilizing something or putting it into action.
When combined, the phrase "be use" does not have a specific etymology, as it is simply a combination of two separate words with their respective origins.