-ton / -tön adjectives indicating the lack of anything onni 'joy' → onneton 'sad' koti 'residence' → koditon 'homeless' -va / -vä adjectives from verbs taitaa 'to find a way' → taitava 'skillful' johtaa 'to steer' → johtava 'main' An appropriate parallel within the Latin alphabet are the people https://suomalainen.vuodatus.net/