Related words 大人おとな しい 大人しい is a more common i-adjective with a similar meaning of 'quiet, gentle, obedient'. 大人しやか is a na-adjective variant that feels slightly more literary or formal, emphasizing a graceful, demure quality.
Written forms 大人おとな しやか
Standard kanji spelling for this adjectival noun.
おとなしやか Usage 100%
Kana spelling is common when the kanji is considered difficult or for emphasis.
Etymology Derived from the adjective 大人しい (おとなしい ) with the suffix やか , which forms na-adjectives expressing a state or quality. The exact historical development is uncertain.
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