Correct spelling for the English word "nebber" is [nˈɛbə], [nˈɛbə], [n_ˈɛ_b_ə] (IPA phonetic alphabet).
The word nebber is considered a nonstandard or vernacular variation of the word never. It is commonly used in African American Vernacular English (AAVE) or other dialects.
The etymology of never can be traced back to Middle English, where it originated from the combination of the Old English words ne, meaning not, and aefre, meaning ever. The ne particle was commonly used in Old English to express negation. Over time, through various phonetic changes and linguistic evolution, nebber emerged as a regional or dialectal pronunciation of never.