ひらたい
hiratai

i-Adjective

1. flat; even; level

古代こだいじんたちは地球ちきゅうひらたいとしんじていた。
kodaijintachiwa chikyūwa hirataito shinjite ita.
The ancients believed the earth was flat.
i-Adjective

2. plain (language, words, etc.); simple

Related to 平たく言えば
Other forms: