1. average, medium, common, ordinary
2. mid-grade (item), regular grade
3. same level as, equal to, equivalent to, on par with
4. each (e.g. month), every
5. row of (teeth, houses, etc.), line of
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although