atwiejszym
Atwiejszym is not a standard Polish word. In common usage and in Polish dictionaries, it does not appear as a recognized form. When it is encountered, it is usually treated as a nonstandard variant or a typographical error for the comparative adjective łatwiejszy or for the instrumental form łatwiejszym. The initial “a” is atypical in the expected inflection of the adjective meaning “easy,” which makes atwiejszym unlikely to be correct in standard Polish.
In Polish, the adjective łatwy meaning “easy” forms the comparative łatwiejszy (masculine nominative). Its other gender
Usage and guidance: If you want to express that something is more easy, use łatwiejszy in agreement