Based on the experiments we have conducted, here is the description of the function f(x):

[DESCRIPTION]: The function f(x) seems to be selective for several concepts. Based on the input-output pairs we tested, it appears that the function is selective for the concepts of natural disasters, danger, and extreme events. Words such as "tsunami," "deadly," and "earthquake" receive high association values close to 1, indicating a strong association with these concepts. Additionally, the function seems to have a lower association with other words like "hip-hop," "water," and "Tour de France," which receive lower association values close to 0. These associations suggest that the function is likely measuring the degree of association between the input words and the concept of natural disasters, danger, and extreme events.