na-adjective
Describes a person's demeanor, behavior, or lifestyle that is modest, unassuming, and restrained. Often used positively for someone who avoids ostentation.
See also: 慎ましい
彼女は慎ましやかな服装をしている。
She dresses modestly.
慎ましやかに暮らすことが彼の信条だ。
Living modestly is his principle.