名詞 brandish:

1. the act of waving
   同義詞：flourish

動詞 brandish:

1. move or swing back and forth
   同義詞：flourish, wave
2. exhibit aggressively

1. Swords brandished and banners waved.
   刀劍揮舞，旌旗飄揚。
2. The demonstrators brandished banners and shouted slogans.
   示威者揮舞著旗幟，呼喊著口號。

bran.dish

v.tr.（及物動詞）
bran.dished,bran.dish.ing,bran.dish.es
To wave or flourish (a weapon, for example) menacingly.
揮舞：威脅性地揮動或揮舞（如武器）
To display ostentatiously.See Synonyms at flourish
炫耀地顯示參見 flourish
n.（名詞）
A menacing or defiant wave or flourish.
威脅性或蔑視性的揮動或舞動

來源：
Middle English brandissen
中古英語 brandissen
from Old French brandir brandiss-
源自 古法語 brandir brandiss-
from brand [sword]
源自 brand [劍]
[of Germanic origin] * see g wher-
[源于日耳曼語的] *參見 g wher-

【引伸】
bran.disher
n.（名詞）