Based on the outputs of the function for the inputs "apple", "car", and "love", it seems that the function is selective for the concept of "love". The output value for the word "love" is significantly higher compared to the other inputs, suggesting a strong association with this concept. Therefore, a possible description of the function implemented by f(x) could be:

[DESCRIPTION]: The function f(x) measures the association of a word with the concept of "love". A higher output value indicates a stronger association, with values closer to 1 indicating a strong association with the concept.