IPA: /ˌmɛm.əˈræn.dəm/
KK: /mɛməˈrændəm/
A written message or note that is used to remind someone or to communicate information, often in a business or legal context.
The manager sent out a memorandum to all employees about the upcoming meeting.
**Memorandum** → It is formed from "memor" (meaning mindful or remembering) and "-andum" (a suffix indicating something that is to be). The word "memorandum" refers to something that is to be remembered or a note to aid memory.
Think of 'mindful' ('memor') and remember that a 'memorandum' is something meant to help you remember important information.