the 'extraordinary or impressive' meaning of incredible has a positive connotation. if somebody describes something as incredible, they are often expressing praise or appreciation.3. how is it similar to or different from other words?synonyms are words with similar meanings. incredible has several synonyms, but some of them have differences in meaning.unbelievable means the same as incredible.not credible means 'hard or impossible to believe', but it doesn't have the 'extraordinary or impressive' meaning. it usually describes people and their words (e.g. his explanation was not credible) and not credible is preferred over incredible for this meaning.amazing also means 'extraordinary or impressive' but it has a stronger connotation of wonder or admiration than incredible does.antonyms are words with opposite meanings. incredible has the antonym credible, but only for its 'hard or impossible to believe' meaning.4. does the word belong to a particular style?some common styles are:global varieties of english (e.g. american english)old-fashioned styleformal, informal or neutral styletechnical or specialised languagespoken language and written languagepoliteness and impoliteness.saying incredible to mean 'good or impressive' is somewhat informal in style. it's more common in speaking than in writing.5. how frequently used is it?incredible is used moderately frequently in speaking. it's more frequent than unbelievable, but less frequent than amazing.6. how do you spell and pronounce it?incredible has ten letters and fairly regular spelling. in pronunciation, it has four syllables – in-cred-i-ble – and the second syllable is stressed.7. what word class is it?the word class is the word's grammatical category: noun, verb, adjective, etc.