missive
noun
[ ˈmɪsɪv ]
• a letter, especially a long or official one.
• "yet another missive from the Foreign Office"
Similar:
message,
communication,
letter,
word,
note,
memorandum,
line,
report,
bulletin,
communiqué,
dispatch,
intelligence,
piece of information,
news,
notification,
announcement,
greeting,
epistle,
memo,
tidings,
Origin:
late Middle English (as an adjective, originally in the phrase letter missive): from medieval Latin missivus, from Latin mittere ‘send’. The current sense dates from the early 16th century.