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,

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

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

animal

a short-beaked echidna

to know through one's own experience

complete denial of knowing (an incident in question)

(Classical Japanese, archaic, honorific) to know

God only knows

to have no way of knowing; to be completely ignorant of