old documents / (in palaeography) historical documents written to convey a specific intention between a sender and receiver; generally inclusive of written material through the mid-19th century

paleography

Alternative spelling of 働き詞: (archaic, grammar) any word that declines or conjugates; (archaic, grammar) more specifically, a verb

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

幾つ: how many / 幾つ: how old (used with small children)

幾つか: some (usually written in kana)

幾つも: many, a great number of

退屈: be bored

退屈: boredom

退屈: boring