Based on the output values of the function for various word inputs, here is a description of the function implemented by f(x):

[DESCRIPTION]: The function seems to be selective for concepts related to emotions. It appears to assign higher values to words that are associated with positive emotions such as joy and love, while assigning lower values to words that are associated with negative emotions such as fear and hate. Additionally, the function seems to assign higher values to words that are associated with celestial objects such as the sun and the moon. Overall, the function seems to have a preference for words related to positive emotions and celestial objects.