public static String normalizeDerivedAdjective(final String word){
  if (isDerivedAdjective(word)) {
    return word.substring(0,word.length() - 2);
  }
 else {
    return null;
  }
}

public static String normalizeDerivedAdjective ( final String word ) { if ( isDerivedAdjective ( word ) ) { return word . substring ( 0 , word . length ( ) - 2 ) ; } else { return null ; } }
normalize the given derived adjective , or return null if not applicable .
