expression
Literary expression describing something that is naturally elegant or moving without deliberate artifice. Often used in the phrase 巧まざる話術 (artless storytelling) or to praise spontaneous beauty.
彼の巧まざるユーモアが会場を和ませた。
His natural, unaffected humor put the audience at ease.
この絵には巧まざる美しさがある。
This painting has an artless beauty.