平坦的，水平的，平整的

1. flat, level, even, smooth

adjectival nouns or quasi-adjectives (keiyodoshi)

平静，安宁，风平浪静，镇定自若，稳定

2. calm, tranquil, placid, composed, stable

adjectival nouns or quasi-adjectives (keiyodoshi)

放松（坐姿），舒适

3. relaxed (sitting posture), comfortable

adjectival nouns or quasi-adjectives (keiyodoshi)

高原，台地，平原

4. plateau, tableland, plain

noun, used as a suffix