What is the best word for sad?

The best Word for "sad" can vary based on context, but "melancholy" often captures a deeper, more reflective sense of sadness. It conveys a lingering emotional state that encompasses both sorrow and introspection. Other synonyms like "sorrowful" or "mournful" may also fit, depending on the situation. Ultimately, the choice of Word depends on the specific nuances you wish to express.