a name (word or phrase indicating a particular person, place, class, or thing) / (more specifically) a given name (excluding the surname)

an asteroid

Diana (asteroid)

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

(computing) name resolution

given name

ignorance is bliss

complete denial of knowing (an incident in question)