taru-adjective, adverb taking the 'to' particle
easily; simply; without difficulty
Formal or literary adverb used to describe an action done with ease, often in a somewhat elevated or written style. Typically appears as 易々と.
He solved the difficult problem with ease.
They easily defeated the enemy.
Standard kanji spelling for this literary adverb.
Variant kanji spelling without iteration mark; less common but still encountered.
Reduplication of the kanji 易 (easy), forming a literary adverb. The reading いい is an on'yomi-based reduplicative pattern.