IPA: //traɪˈʌmfəlɪst//
KK: /traɪˈʌmfəlist/
A person who celebrates or believes in victory or success, often in a boastful or overly proud way.
The triumphalist attitude of the team after their win was evident in their celebrations.
Triumphalist → It is formed from "triumphus" (from Latin, meaning a great victory or celebration) and the suffix "-alist" (meaning one who advocates or supports). The word refers to someone who advocates for or celebrates victory, often in a boastful or excessive manner.
Think of someone who celebrates a 'great victory' ('triumphus') and is an 'advocate' ('-alist') for that victory, which helps you remember that a triumphalist is someone who promotes or revels in success.