the present, now

now, at present

the past / ancient times

(not of a person) old, aged, antiquated

old

aquamarine (the color or the gemstone)

use one thing for many purposes / work someone hard

to use one's head

a letter, a character (symbol for a sound or a word) / (linguistics) script, writing system / (specific to Japanese) a written mora, a kana / writing in general, written words

a letter or character (symbol for a sound or a word) / (linguistics) script, writing system / (specific to Japanese) a written mora, a kana / writing in general, written words