What does 平たい mean?
平たい is a Japanese adjective meaning “flat, even, level” in English. It can also be translated as “plain (language, words, etc.)” depending on context. It is written as 平たい in kanji, ひらたい in hiragana, and hiratai in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
古代人たちは地球は平たいと信じていた。
The ancients believed the earth was flat.