IPA: /ˌmaɪkrəˈskɒpɪkli/
KK: /maɪkrəˈskɑpɪkli/
In a way that relates to very small things that can only be seen with a microscope.
The bacteria were observed microscopically under the microscope.
Microscopically → It is formed from "micro-" (from Greek "mikros", meaning small) and "scopically" (from Greek "skopein", meaning to look or examine). The word "microscopically" refers to examining or looking at things that are very small, typically with the aid of a microscope.
Think of 'small' ('micro-') and 'looking' ('skopein') to remember that 'microscopically' means looking at things that are very small.