static Map<S, Set<S>> ai_englishAntiWordCategoriesWithElements() {
  final Map<S, Set<S>> wordCategories = ciMap();
  for (S cat : mL("All english word categories"))
    putIfValueNempty(wordCategories, cat, combinedMechSetsCI(ai_antiMechListNamesForAngleBracketCategory(cat)));
  ret wordCategories;
}