revocation

名词 revocation:

1. the state of being cancelled or annulled
   同义词：annulment
2. the act (by someone having the authority) of annulling something previously done

rev.o.ca.tion

n.（名词）
The act or an instance of revoking.
撤消：撤消或废除的行为或实例

来源：
Middle English revocacion
中古英语 revocacion
from Old French
源自 古法语
from Latin revoc3tiô revoc3tiôn-
源自 拉丁语 revoc3tiô revoc3tiôn-
from revoc3tus [past participle of] revoc3re [to call back] * see revoke
源自 revoc3tus [] revoc3re的过去分词 [召回] *参见 revoke

【引伸】
rev.ocato.ry