IPA: //ˈsuːtəbl//
KK: /ˈsutəbl/
Right or appropriate for a particular purpose or situation.
This dress is suitable for the wedding ceremony.
Comparative: more suitable
Superlative: most suitable
Suitable → It is formed from "suit" (from Old French *suiter*, meaning to follow or to be appropriate) and the suffix "-able" (meaning capable of or worthy of). The word "suitable" means capable of being appropriate or fitting for a particular purpose or situation.
Think of something that is 'appropriate' or 'fitting' for a situation — that's what 'suitable' means.