reverseWords =: (,' '&,)&:>/@:|.@:;:
   reverseWords '  one   two three four    '
four three two one

##</code><code>##

   reverseWord1 =: [:(,' '&,)&:>/@:|.@:-.&a:e.&' ^'<@}.;.1]
   reverseWord1 '  one   two three^four    '
four three two one

##</code><code>##

   reverseWord2 =: [:}.@;@|.e.&' ^'<@(' '&,@}.`(0$])@.(2>#));.1]
   reverseWord2 '  one   two three^four    '
four three two one