1. Your arrogance has cost you many friends.2. Sheldon is the most egotistical, insufferable human being I've ever met.3. Since he was promoted, he's been drunk with arrogance.4. Do not think you are above everyone else; there are always people better than you.5. There were many pretentious people at the party.
 arrogant; haughty; cocky insolent egotistical pretentious口氣較重. egotistical 很貼切
I tried to explain how the software works to my dad, but he is slw on the uptake.