What does most basic adjective suffixes mean?

It's important to note that there's no single, universally accepted list of "basic" adjective suffixes. Different languages have different suffixes and some are more common or basic than others. However, some common suffixes across languages often convey the following meanings:

-able/-ible: Ability or possibility. Example: *breakable, edible, credible*

-ful: Full of, characterized by. Example: *beautiful, hopeful, helpful*

-less: Without, lacking. Example: *careless, fearless, hopeless*

-ish: Resembling, having the qualities of. Example: *childish, foolish, reddish*

-ous/-ious: Characterized by, full of. Example: *dangerous, famous, curious*

-y/-ey: Characterized by, having the quality of. Example: *funny, sleepy, wealthy*

-like: Resembling, similar to. Example: *childlike, doglike, dreamlike*

Other common suffixes:

-al: Relating to, characteristic of. Example: *national, regional, natural*

-an/-ian: Belonging to, related to. Example: *American, Parisian, Martian*

-ic: Relating to, characteristic of. Example: *historic, dramatic, scientific*

-ive: Having the quality of, tending to. Example: *effective, creative, active*

Important notes:

* The meaning of a suffix can vary depending on the base word. For example, "ish" can sometimes mean "somewhat" or "slightly" (e.g., *greenish, reddish*).

* Some suffixes are more common in certain languages than others. For example, "-ous" is more common in English than "-ic".

* There are many other adjective suffixes not mentioned here, and the meaning of some suffixes can be quite nuanced.

It's always helpful to consult a dictionary or grammar resource for a more comprehensive understanding of adjective suffixes in any given language.