IPA: /ˌkɒn.tjuːˈmɛl.i.əs/
KK: /kɒnˈtjuːmɪlɪəs/
Showing a rude and disrespectful attitude; behaving in a way that is insulting or humiliating to others.
His contumelious remarks during the meeting offended everyone present.
Contumelious → It is formed from "contumelia" (meaning insult or injury) and the suffix "-ous" (meaning full of). The word describes someone who is full of insults or disrespectful behavior.
Think of someone who is 'full of insults' — 'contumelia' refers to insults, and '-ous' means full of.