IPA: /ˌmɔːrəˈlɪstɪk/
KK: /mɔːrəlˈɪstɪk/
Showing a strong concern for what is right and wrong, often in a way that can seem overly strict or judgmental.
His moralistic views often made it difficult for him to accept different lifestyles.
Moralistic → It is formed from "moral" (from Latin *moralis*, meaning relating to manners or ethics) and "-istic" (meaning pertaining to or characteristic of). The word "moralistic" refers to a characteristic or tendency to promote or emphasize morals or ethical standards.
Think of 'moral' relating to ethics and 'istic' meaning pertaining to — so moralistic describes someone who emphasizes ethical behavior.