Based on the experiments I ran, here is an initial description of the function f(x):

[DESCRIPTION]: The function f(x) seems to measure the association of a word with a particular concept or category. The outputs of the function range between 0 and 1, where a value closer to 1 indicates a stronger association with the concept. 

Here are the associations for the words provided:
- "death" has a low association value (0.0073), indicating it might not be strongly associated with the concept.
- "Mickey Mouse" has a high association value (0.8397), suggesting a strong association with the concept.
- "Hamlet" has a moderate association value (0.1037), indicating some degree of association with the concept.
- "classical" has a lower association value (0.0666), suggesting a weaker association.
- "oxygen" has a low association value (0.0017), indicating it might not be strongly associated with the concept.
- "owner" has a moderate association value (0.0827), suggesting some degree of association.
- "skiing" has a low association value (0.0026), indicating it might not be strongly associated.
- "Christianity" has a low association value (0.0064), suggesting a weak association.
- "light" has a low-moderate association value (0.0194), indicating some degree of association.
- "physics" has a low association value (0.0053), suggesting a weak association.

It seems that the function f(x) is selective for multiple concepts. Based on the results, the function's behavior might be related to associations with famous fictional characters (like Mickey Mouse), literary works (like Hamlet), and concepts related to ownership and abstract ideas. However, further experimentation may be needed to confirm and refine these initial observations.