1 to use

2 to employ

3 to apply

4 to make use of

1 Japan

1 root

2 stem

3 origin

4 source

5 this

6 the current

7 original

8 inherent

9 originally

10 classifier for books, periodicals, files etc

1 original

2 originally

3 at first

4 it goes without saying

5 of course

1 to use

2 to employ

3 to have to

4 to eat or drink

5 expense or outlay

6 usefulness

7 hence

8 therefore

1 to do two things at once (idiom)

2 to multitask

3 to divide one's attention

1 small capital, huge profit (idiom); to put in a little and get a lot out

1 to talk shop all the time (idiom)

1 to have an ulterior motive (idiom)

1 to have no other use or purpose (idiom)