| on | just as it should be |
|---|---|
| on | from appearances alone |
| on | on the farther side from the observer |
| on | characterized by indecision |
| on | on the run or in a hurry |
| on | (of a person) very busy and active |
| on | caught in a difficult or dangerous situation |
| on | watchful and prepared for action |
| on | actively engaged in paid work |
| on | having escaped, especially from confinement |
| on | being in physical motion |
| on | being precisely to a prescribed or specified criterion |