docs: def replace_suffixes_4(self, word):
          """
          Perform replacements on even more common suffixes.
          """
          length = len(word)
          replacements = {'ational': 'ate', 'tional': 'tion', 'alize': 'al',
                          'icate': 'ic', 'iciti': 'ic', 'ical': 'ic',
                          'ful': '', 'ness': ''}
  
          for suffix in replacements.keys():
              if word.endswith(suffix):
                  suffix_length = len(suffix)
                  if self.r1 <= (length - suffix_length):
                      word = word[:-suffix_length] + replacements[suffix]
  
          if word.endswith('ative'):
              if self.r1 <= (length - 5) and self.r2 <= (length - 5):
                  word = word[:-5]
  
          return word