a whetstone: と (to), more commonly spelled using 砥 / to polish: みがく (migaku), more commonly spelled using 磨 / to flatten: たいらにする (taira ni suru), more commonly spelled using 平

sharpen, whet an ax or knife / wash rice / polish, clean a surface

kitchen knife, cooking knife, cleaver

to use / to employ / to make use of, to apply / to spend

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

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

a personal or private matter / (by extension) selfishness

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

personal, private / secret

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