Based on the experiments conducted, here is a description of the function implemented by f(x):

[DESCRIPTION]: The function f(x) seems to have a high affinity for the concept of "flowers". When the word "flowers" is provided as input, the function returns a value very close to 1, indicating a strong association with the concept of flowers. Additionally, the function also seems to have a moderate affinity for the concept of "plants", as evidenced by the relatively high output value of 0.9196 when the word "plants" is used as input. 

This suggests that the function f(x) is selective for both the concepts of "flowers" and "plants". It is possible that the function f(x) is designed to assess the presence or relevance of these concepts in some way. 

Please note that this description is based on the limited experiments performed with a specific set of words. It is advisable to conduct further experiments with a diverse range of words to confirm and refine this description.