The Vietnamese word "ung" primarily means "rotten" or "decayed." It is often used to describe food that has gone bad or is no longer fresh.
"Ung" can also be used in a broader context to describe anything that is spoiled or in poor condition, not just food. In a figurative sense, it can describe a situation or relationship that has soured or become unhealthy.
Aside from its primary meaning related to decay, "ung" can also imply a sense of being spoiled or corrupted in other contexts. For instance, it can describe moral decay or a negative change in someone's character.
In summary, "ung" is a versatile word in Vietnamese that denotes decay, spoilage, and deterioration, especially in food and other contexts.