The suffix of the abessive is tta or ttä. Examples: talo : talo|tta, mies : miehe|ttä. Plural examples: talo|i|tta, mieh|i|ttä.
The abessive corresponds to English preposition “without”. It is used rarely, except in short phrases such as luvatta (without permission), rahatta (without money), syyttä (without reason), and enemmittä puheitta (without more talks). Some old-style proverbs may contain it, too, e.g. Joka kuritta kasvaa, se kunniatta kuolee (Who grows up without discipline, dies without honor).
Normally, the preposition ilman with the partitive is used instead, e.g. ilman taloa rather than talotta. Using double negative like ilman rahatta is not uncommon, but it is not standard.
Although the abessive is rather marginal in the inflection of nouns, it is still in common in III infinitive forms of verbs, like syömättä (without eating). In such usage, it often cannot be replaced in a natural way by other expressions (ilman että syö is possible, but clumsy).