A few options here would be reciprocal:
Mathematics (of a quantity or function) related to another so that their product is one
This isn't quite as translatable into normal usage because the standard use of reciprocal means something more akin to equal or mutual.
Another option is reversal:
a change to an opposite direction, position, or course of action
While the opposite of wane is wax, the reversal of wane would be an un-wane. The subtle difference here is key:
The opposite of scoring a goal is not scoring a goal.
The reversal of scoring a goal is to take back the goal.
Hitting up a thesaurus then provides these alternatives:
- undoing
- countering
- overriding
- revocation
- repeal
And so on. Many words do not have appropriate reversals or antonyms and sometimes the same word can work for both.
In response to the edit, non- adds a third option to the pool which means "Not in the state of." This could be seen as an absence or negation. Much like how reversal and opposite can both apply, absence can fit into the same word as well:
This is hot; that is cold.
Hot is the opposite of cold; cold is also the absence of heat.
Industrious. Ambitious. Assiduous. Productive. Hardworking. Hyperactive.
There is no word that specifically captures the exact notion you are describing, that is why we use sentences composed of multiple words to express nuanced ideas. The words provided above could fit your needs depending on context.
Best Answer
Stagnant - not advancing or developing
or
Stale - not interesting or new
both have the connotations of old and unchanged.