動詞 evacuate:

1. move out of an unsafe location into safety
2. empty completely
3. move people from their homes or country
4. create a vacuum in (a bulb, flask, reaction vessel)
   同義詞：exhaust
5. excrete or discharge from the body
   同義詞：void, empty

1. The children were evacuated to the country when the city was being bombed.
   城市遭到轟炸時，兒童都疏散到鄉(xiāng)下去了。
2. The soldiers evacuated the area as the enemy advanced.
   敵軍推進時，士兵都撤出了那地區(qū)。
3. The region near the erupting volcano was evacuated rapidly.
   火山爆發(fā)處附近已迅速撤空。

e.vac.u.ate

v.（動詞）
e.vac.u.at.ed,e.vac.u.at.ing,e.vac.u.ates
v.tr.（及物動詞）

To empty or remove the contents of.
使空，撤空：使…的內(nèi)容變空或撤空
To create a vacuum in.
抽空：使產(chǎn)生真空
To excrete or discharge (waste matter), especially from the bowels.
排空：通過排泄道排出（廢物），尤指從腸

To relinquish military possession or occupation of (a town, for example).
撤退：放棄軍事地區(qū)或占領(lǐng)地（如一城鎮(zhèn)）
To withdraw or send away (troops or inhabitants) from a threatened area.
撤離：從一個受到威脅地區(qū)（使軍隊或居民）撤走或離去
To withdraw or depart from; vacate.
從…撤出或撤離；使空
v.intr.（不及物動詞）
To withdraw from or vacate a place or area, especially as a protective measure.
使喪失；空虛：從一地點或地區(qū)撤離或疏散，特指在保護措施下
To excrete waste matter from the body.
排除，清除：從體內(nèi)排出廢物

來源：
Middle English evacuaten
中古英語 evacuaten
from Latin ôvacu3re ôvacu3t- [to empty out]
源自 拉丁語 ôvacu3re ôvacu3t- [使成空]
ô-, ex- [ex-]
ô-, ex- [前綴，.前任的，從前的.]
vacuus [empty] from vac3re [to be empty] * see eu- 2
vacuus [空虛] 源自 vac3re [使喪失] *參見 eu- 2

【引伸】
evac.ua.tive
adj.（形容詞）
evac.ua.tor
n.（名詞）