Related Clues:
- Prejudices that prohibit the mention of something
- Prohibitions on things not to be done
- They're forbidden by religion or social custom
- Unspeakable acts
- This number and those numbers, they're all inadvisable
- They're frowned upon
- They're not allowed thanks to some scary words
- Cake and ice cream, to dieters
- They're not allowed
- Running with scissors and others
- Prohibits cheers and jeers
- Pitchers' hitless games, in baseball slang
- They shouldn't be done
- Looking back, graduate swamped by the black stuff produces societal prohibitions
- Discouraged behaviors