Hediondo is a Spanish word which means "foul" or "disgusting". Synonyms for this word include "repugnant", "nauseating", "revolting", "repulsive", "odious", "abhorrent", "displeasing", "distasteful", "offensive", and "vile". All these words express the same idea of something or someone being incredibly unpleasant or offensive to the senses. They are often used to describe strong smells or tastes that are hard to bear. While one may try to avoid using such words to avoid hurting someone's feelings, they sometimes become necessary to express a particular point or sentiment.