(astronomy) a neutron star

(physics) density

(physics) gravity, gravitational force / (rare) considerable strength or power

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,

against one's will

hard, tough, stiff / stubborn

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

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

strong / strength / powerful / potent

(lengths of time) slightly more than