-ru Godan/u-verb

1. to be involved (in); to get involved (in); to concern oneself (with); to take part (in); to interfere (in)
2. to relate to (a matter); to pertain to; to concern; to have to do with
3. to (seriously) affect; to concern; to have a serious bearing (on)
4. to stick (to); to adhere (to); to be particular (about)