Final answer:
The envious neighbor was not happy for the man's removal of his wen because he was consumed with envy, a feeling which reflects a lack of genuine happiness for others' successes.
Step-by-step explanation:
The neighbor in the The Elves and the Envious Neighbour was not happy for the man due to envy. This form of jealousy is often a response to another's good fortune, reflecting a desire for oneself rather than a genuine appreciation of the other person's success. The negative response of the envious neighbor contrasts with the shared joy of the man's friends, highlighting a key theme in many stories and fables: the impact of envy and resentment on social harmony.