What does the suffix -Idal mean?

Answer 1

Well, darling, the suffix -idal means "relating to" or "pertaining to." So if you see a word like "acidal," it means something is related to acid. It's as simple as that, sugar.

Answer 2

The suffix -idal typically denotes a connection or relation to a particular place, group, or idea. For example, "tribal" indicates a connection to a tribe, "cultural" indicates a connection to culture.