IPA: /ˌmækrəˈskɒpɪkli/
KK: /mækˈrɒskəˌpɪkli/
In a way that can be seen or observed with the naked eye, rather than through a microscope or other magnifying tools.
The changes in the ecosystem were macroscopically evident after the pollution incident.
Macroscopically → It is formed from "macro-" (from Greek "makros", meaning large) and "scopic" (from Greek "skopein", meaning to look or examine). The word "macroscopically" refers to observing or examining something on a large scale or with the naked eye, rather than at a microscopic level.
Think of 'large' ('macro-') and 'to look' ('skopein') to remember that 'macroscopically' means looking at things on a large scale.