土-100 坦 (形) ① level; smooth ② completely at ease

坦  坦是形声字。土为形符；旦为声符。《说文》注： “安也。从土,旦声。”坦义为平、宽、安舒。又指胸怀宽广， 心境平定。引申直率，无隐讳。近代战争武器中指坦克，译于英语Tank。

坦 (形) ① level; smooth ② completely at ease