IPA: /ˈsiː.zən.ə.bəl/
KK: /ˈsiːzənəbl/
Appropriate or suitable for a particular time of year or situation.
The seasonable weather made it perfect for a picnic in the park.
Seasonable → It is formed from "season" (from Old French *saison*, meaning a time or period) and "-able" (meaning capable of or suitable for). The word "seasonable" means suitable for a particular season or time.
Think of a time or period ('season') that is suitable for something, which is what 'seasonable' means.