IPA: //ˈblæsfɪmər//
KK: /ˈblæsfɪmər/
A person who speaks disrespectfully about God or religion, often mocking or showing contempt.
The blasphemer was condemned for his harsh words against the sacred beliefs.
Blasphemer → It is formed from "blasphemare" (meaning to speak evil of) and the suffix "-er" (meaning a person who). A blasphemer is a person who speaks evil or disrespectfully about sacred things.
Think of someone who 'speaks evil' ('blasphemare') about something sacred — that's why a blasphemer is someone who disrespects holy matters.