Lucky is an adjective that refers to being fortunate or having good luck. Its antonym, unlucky, is the opposite of lucky and is used when something is unfortunate or unlucky. However, there are several other antonyms for unlucky that can be used to convey different nuances of meaning. These include words like fortunate, lucky, prosperous, successful, and blessed. For example, instead of saying "I had an unlucky day," one could say "I had an unfortunate day" or "I had a difficult day." By using different antonyms for unlucky, speakers can convey different levels of positivity or negativity in their statements.