na-adjective
Describes heartfelt, considerate actions or feelings, often in personal relationships.
彼女の細やかな心遣いに感動した。
I was touched by her thoughtful consideration.
na-adjective
Used for careful, thorough attention to small points, such as in work or descriptions.
彼は細やかな説明で、誰にでもわかりやすく話した。
He gave a detailed explanation that was easy for anyone to understand.
na-adjective
Describes rich, dense quality of color or fog; less common than the other senses.
山には細やかな霧が立ちこめていた。
A thick fog hung over the mountain.
Derived from 細 (こま, 'fine, small') + やか (adjectival suffix). The 'deep/thick' sense may be a separate homophone written with 濃, but the exact historical relationship is uncertain.