1. to throw; to cast (e.g. vote, light, shadow) (usu. 投じる)

2. to devote oneself (e.g. to a cause) (in the form of 身を投ずる)

3. to invest; to put in

4. to administer (medicine); to give

5. to surrender

6. to take advantage of; to make full use of

7. to fit well with; to match with; to be in tune with

8. to stay (at a lodging)