(emphatic) Alternative form of よく (yoku)

language, speech

a logogram

systematic

system / series / lineage / family

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

A retrievable arrow attached to a string.