vi.

1. （獅，虎等）吼叫；（風等）呼嘯；（雷，砲等）轟鳴
   Day and night heavy trucks roared past their houses.

   重型卡車日夜不停地從他們家呼嘯而過。

2. 大聲叫喊；狂笑；大聲歌唱[（+at/with）]
   He roared with anger.

   他氣得大吼。

   The sergeant roared at his men.

   中士對他的士兵大吼。

3. 喧譁；喧鬧
4. （馬）喘鳴

vt.

1. 呼喊；大聲喊出；高唱[（+out）]
   The crowd roared their approval.

   人群大聲呼喊贊成。

2. 叫喊得使……[O8]
   He roared himself hoarse.

   他喊啞了嗓子。

3. 使轟鳴

n.[C]

1. 吼，嘯；怒號；轟鳴聲；喧鬧聲
   The little girl was frightened by the tigers roars.

   小女孩被老虎的吼叫聲嚇壞了。

2. 呼叫；大笑聲
   A roar of laughter greeted our ears.

   一陣大笑聲傳入我們耳中。

n.

v.

1. make or utter a roar.
   ▸express in a roar.
   ▸laugh loudly.
   ▸(of a horse) make a loud noise in breathing as a symptom of disease of the larynx.
2. (of a vehicle) move with a roar at high speed.
   ▸act or happen fast and decisively.