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...古板嚴厲的父親He has a puritanical attitude towards sex.他在性問題上主張克制，反對縱欲。
英漢詞典釋義
adj.
<貶>清教徒式的,道德極嚴格的
a puritanical dislike of self-indulgence清教徒般地不喜歡自我放縱
英英詞典釋義
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"