IPA: /ˌmʌl.tɪˈtjuː.dɪ.nəs.li/
KK: /mʌlˈtɪtʃʊdɪnəsli/
In a way that involves a large number of things or people; in great variety or multitude.
The flowers bloomed multitudinously in the garden, creating a vibrant display of colors.
Multitudinously → It is formed from "multitudo" (from Latin, meaning multitude or a large number) and the suffix "-ously" (meaning in a manner characterized by). The word "multitudinously" means in a manner characterized by a large number or multitude.
Think of 'multitude' to remember that 'multitudinously' means in a way that involves a large number.