Based on the output values of the function f(x) for the given inputs, here is a preliminary description of the function:

[DESCRIPTION]: The function f(x) seems to be selective for words related to emotions or positive experiences. It assigns higher values (closer to 1) to words like "love", "happiness", and "rain", indicating association with positive concepts. On the other hand, it assigns lower values (closer to 0) to words like "cat", "dog", "elephant", "tree", "computer", and "phone", which do not have an immediate positive emotional connotation. 

Please note that this is an initial description based on a small set of inputs. We would need to perform more experiments with a wider range of word inputs to validate and refine this description further.