ひら平hiraたいtai
1.
Describing a surface that is smooth and uniform without any noticeable bumps or depressions, indicating a lack of elevation or thickness.
2.
Referring to language or expressions that are straightforward and easy to understand, avoiding complex or formal terminology.
3.
Characterizing a demeanor or attitude that lacks sharpness or harshness, often connoting a gentle and approachable quality.
Example:
古代人たちは地球は平たいと信じていた。