IPA: /ˈmɛnəsɪŋli/
KK: /mɛnəˈsɪŋli/
In a way that suggests a threat or danger.
The dog growled menacingly at the stranger approaching the house.
Menacingly → It is formed from "menace" (from Old French *menacer*, meaning to threaten) and the suffix "-ly" (meaning in a manner of). The word "menacingly" describes an action done in a threatening manner.
Think of someone acting in a way that shows they are 'threatening' ('menace') — and the '-ly' means it's done in that manner. This helps you remember that 'menacingly' refers to doing something in a threatening way.