名詞 missive:

1. a written message addressed to a person or organization
   同義詞：letter

mis.sive

n.（名詞）
A written message; a letter.See Synonyms at letter
信件：書寫下來的信息參見 letter

來源：
From Middle English (letter) missive [(letter) sent (by superior authority)]
源自 中古英語 (letter) missive [（由高層權(quán)威機構(gòu)）送來的（信件）]
from Medieval Latin (littere) missove [feminine pl. of] missovus [sent]
源自 中世紀(jì)拉丁語 (littere) missove [] missovus的陰性復(fù)數(shù) [被送]
from Latin missus [past participle of] mittere [to send]
源自 拉丁語 missus [] mittere的過去分詞 [送]