If you describe someone as puritanical, you mean that they have very strict moral principles, and often try to make other people behave in a more moral way.
例句
...puritanical fathers...古板严厉的父亲He has a puritanical attitude towards sex.他在性问题上主张克制，反对纵欲。
英汉词典释义
adj.
<贬>清教徒式的,道德极严格的
a puritanical dislike of self-indulgence清教徒般地不喜欢自我放纵
英英词典释义
Adjective
1. of or relating to Puritans or Puritanism
2. exaggeratedly proper;
"my straitlaced Aunt Anna doesn't approve of my miniskirts"
3. morally rigorous and strict;
"blue laws""the puritan work ethic""puritanic distaste for alcohol""she was anything but puritanical in her behavior"