神髄, 真髄: (figurative): The spirit or soul of something: its essence, its true quality. / 心髄: The marrow or core of something. / 神瑞: A good omen.

understanding, comprehension / appreciation

(figurative): The spirit or soul of something: its essence, its true quality.

(figurative): The spirit or soul of something: its essence, its true quality.

understand, comprehend / appreciate

needed, necessary

need, necessity

straightforwardly, wholeheartedly, unreservedly, directly, immediately, all at once, in one go

(archaic) exactly that, directly or immediately that

(dialect, Hakata) frightening; scary