Build, test, and debug regular expressions
Matches complete words that contain no vowels (a, e, i, o, u), case-insensitive due to the 'i' flag. The pattern captures one or more non-vowel, non-whitespace characters delimited by word boundaries, so it finds vowel-less words like 'rhythm', 'why', 'hmm', or 'grr'. Useful for linguistic analysis, word games, or filtering interjections from text. Note that 'y' is treated as a consonant here.