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<|w>
Combined from primary sources listed below.

In Regexes§

See primary documentation in context for Word boundary

To match any word boundary, use <?wb>. This is similar to \b in other languages. To match the opposite, any character that is not bounding a word, use <!wb>. This is similar to \B in other languages; \b and \B will throw an X::Obsolete exception from version 6.d of Raku.

These are both zero-width regex elements.

say "two-words" ~~ / two<|w>\-<|w>words /;    # OUTPUT: «｢two-words｣␤» 
say "twowords" ~~ / two<!|w><!|w>words /;     # OUTPUT: «｢twowords｣␤»