| Term | Definition |
| permitted | to allow to do something |
| volunteers | to perform or offer to perform a service of one's own free will |
| horizon | the line or circle that forms the apparent boundary between earth and sky |
| registers | to enter in an official register |
| sequel | something that follows; a continuation |
| subtle | thin, tenuous, or rarefied, as a fluid or an odor |
| substitute | a person or thing acting or serving in place of another |
| licensed | formal permission from a governmental or other constituted authority to do something, as to carry on some business or profession |
| intermediate | being, situated, or acting between two points, stages, things, persons, etc.: the intermediate steps in a procedure |
| opportunities | a good position, chance, or prospect, as for advancement or success |
| hover | to remain in an uncertain or irresolute state; waver: to hover between life and death. |
| resetting | to set again: to reset an alarm clock |