taru-adjective, adverb taking the 'to' particle
Describes a surface or terrain that is flat and even, without bumps or irregularities. Often used in literary or descriptive contexts.
坦々とした道がどこまでも続いていた。
A flat road stretched on endlessly.
taru-adjective, adverb taking the 'to' particle
Describes a situation, life, or mood that is calm, without trouble or excitement, sometimes with a nuance of monotony. Often used with とした.
彼は坦々とした日々を送っている。
He leads a peaceful, uneventful life.
Reduplication of 坦 (tan, 'flat, level'), forming a taru-adjective/adverb. The exact historical derivation is uncertain, but the form follows a classical pattern for descriptive words.