硬い: keeping its physical shape or appearance under a force: stiff / 固い: keeping its shape or behaviour even under other influences: hard, firm

(archaic) the place of residence of the emperor / (by extension) a capital city / (by extension) a capital (most important city in the field specified)

(chiefly women's speech) first person singular pronoun: I, me

tax

(historical, archaic) general term for items presented by the people to the state: tribute, taxes

private; mine

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

a personal or private matter / selfishness / privacy, secrecy / (women's speech, obsolete) a brother-in-law

personal, private / secret