Meaning of "Byeongyaksu"
A condition in which one is physically very frail, whether from birth or due to later circumstances, resulting in poor health
"Although he had been frail since childhood and suffered from frequent illnesses, he gradually recovered through regular exercise and a healthy diet."
Related slang words
MushimsuThis refers to an attitude (or a person) who shows little emotional fluctuation and acts insensitive toward others or in romantic relationships, making it easy for their partner to feel hurt.RainfallA state of extreme physical and mental strength, characterized by a mindset that refuses to yield to threats or pressure and remains resolute to the very endCircular RingA collective term for narrative devices such as time travel, possession, and reincarnationStrategistA person who is skilled at devising elaborate plans to manipulate situations and achieve their own goals or gain an advantageEsperIn the Guidebus universe, this term refers to beings who possess powerful superpowers but are at high risk of losing control under certain conditions, and therefore require guidance and supervision from others.OmegaIn the Omegaverse, this term refers to beings who possess the traits of the submissive class, including the ability to become pregnant and experience periodic heat cycles.SentinelA character or entity known as a "Sentinelbus" in the Guidebus universe, possessing abilities that transcend the five senses, but requiring physical contact with a Guide as an essential conditionBetaIn the Omegaverse, this refers to a "regular person" who is largely unaffected by major effects such as pheromone reactions or physical transformations.