(idiomatic) thoughts buried deep inside the heart

hide, keep feelings or thoughts inside, keep something to oneself

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

thought / feeling, emotion, sentiment

considerate of; caring about

(literary) they (about women or girls)

to know, be aware of / to learn, acquire, / to be acquainted with, to know (someone) / (colloquial, in the negative) to care in the least about, to be concerned with,

stem or continuative form of 知る (shiru) [godan]

Alternative spelling of 物知り: a person with broad knowledge, a knowledgeable person