名詞 gloat:

1. malicious satisfaction
   同義詞：gloating, glee

動詞 gloat:

1. dwell on with satisfaction
   同義詞：triumph, crow
2. gaze at or think about something with great self-satisfaction, gratification, or joy

1. Don't you think it's a little unkind to gloat over your competitor's failure?
   你難道不認為對你對手的失敗幸災樂禍是有點不近人情嗎？
2. Stop gloating just because you won the game!
   別因為贏了就揚揚得意！
3. It's nothing to gloat about.
   沒有什麼可幸災樂禍的。

gloat

v.intr.（不及物動詞）
gloat.ed,gloat.ing,gloats
To feel or express great, often malicious, pleasure or self-satisfaction:
洋洋自得，幸災樂禍：感覺或表達極為強烈的，通常是帶有惡意的愉悅或自我滿足：
例句：
Don`t gloat over your rival`s misfortune.
不要幸災樂禍于對手的厄運

n.（名詞）
The act of gloating.
得意揚揚，幸災樂禍：洋洋自得、幸災樂禍的行為
A feeling of great, often malicious, pleasure or self-satisfaction.
自我滿足，得意揚揚，幸災樂禍：極為強烈的感覺，通常是帶有惡意的愉悅或自我滿足

來源：
[Perhaps of Scandinavian origin] * see ghel- 2
[可能源于斯堪的納維亞語] *參見 ghel- 2

【引伸】
gloat.er
n.（名詞）