invoke

动词 invoke:

1. summon into action or bring into existence, often as if by magic
   同义词：raise, conjure, conjure up, evoke, stir, call down, arouse, bring up, put forward, call forth
2. cite as an authority; resort to
   同义词：appeal
3. request earnestly (something from somebody); ask for aid or protection
   同义词：appeal

1. The government has invoked the official secret act in having the book banned.
   政府援引国家机密保密法以禁该书。
2. They invoked help in the desperate situation.
   他们在走投无路的情况下恳求援助。

in.voke

v.tr.（及物动词）
in.voked,in.vok.ing,in.vokes
To call on (a higher power) for assistance, support, or inspiration:
乞灵：祈求（一种更高的力量）给予帮助，支持，或灵感：
例句：
.Stretching out her hands she had the air of a Greek woman who invoked a deity.(Ford Madox Ford)
.她伸出她的双手，就象一个希腊妇人祈求神灵一样.(福特·马多克斯·福特)

To appeal to or cite in support or justification.
授引：提出或授引…以支持或证明
To call for earnestly; solicit:
恳求：恳切地请求；恳请：
例句：
invoked the help of a passing motorist.
恳求一位过路的汽车司机给予帮助

To summon with incantations; conjure.
召鬼：用咒语唤来；召来鬼魂
To resort to; use or apply:
借助：求助于；使用或应用：
例句：
.Shamelessly, he invokes coincidence to achieve ironic effect.(Newsweek)See Synonyms at enforce
.可耻的是，他借助于巧合来达到反讽效果.(新闻周刊)参见 enforce

来源：
Middle English envoken
中古英语 envoken
from Old French invoquer
源自 古法语 invoquer
from Latin invoc3re
源自 拉丁语 invoc3re
in- [in] * see in- 2
in- [在…里面] *参见 in-2
voc3re [to call] * see wek w-
voc3re [呼唤；叫] *参见 wek w-

【引伸】
invok.er
n.（名词）