| on | (of two persons) in direct encounter |
|---|---|
| on | determined by a single party |
| on | designed for or restricted to a single person |
| on | (of clothing) consisting of or fashioned in a single whole piece |
| on | one part in a quadrillion |
| on | one part in a quintillion |
| on | a seventh part |
| on | involving only one part or side |
| on | excessively devoted to one faction |
| on | favoring one person or side over another |
| on | not reversible or capable of having either side out |
| on | out of proportion in shape |