adverb, adverb taking the 'to' particle
comfortably; easily; with ease
Describes doing something without difficulty or strain; often implies a relaxed, effortless manner. Can be used with と (adv-to) or as a standalone adverb.
He carried the heavy box with ease.
This sofa can comfortably seat three people.
He passed the exam easily.
Sales of the new product easily exceeded the target.
She passed the exam with ease.
He accomplished the difficult task with ease.
容易 is a formal, written-style word for 'easy', whereas 楽々 is a livelier, more colloquial adverb often paired with と.
難なく focuses on the absence of difficulty or obstacles, while 楽々 additionally suggests a relaxed, comfortable manner of doing something.
軽々 and 楽々 both describe doing something with ease, but 楽々 stresses comfort and lack of strain while 軽々 focuses on lightness or lack of seriousness in the manner.
楽しい shares the kanji 楽 but means 'fun/enjoyable', a completely different meaning from 楽々 'easily, with ease'.
Standard kanji spelling; common in news and everyday writing.
Kana spelling is natural in casual writing and when avoiding kanji.
Katakana spelling used for emphasis or in informal contexts such as advertising.
Less common kanji repetition variant; learners may encounter it but 楽々 is preferred.
Reduplication of 楽 (らく, 'comfort, ease'), forming an adverb that intensifies the meaning.