Meaning of "Mushimsu"
This 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.
"He always acted as if he were indifferent, so even the slightest remark would unintentionally hurt the other person."
Related slang words
ByeongyaksuA condition in which one is physically very frail, whether from birth or due to later circumstances, resulting in poor healthStrategistA 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.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 endOmegaIn 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.Circular RingA collective term for narrative devices such as time travel, possession, and reincarnationBetaIn the Omegaverse, this refers to a "regular person" who is largely unaffected by major effects such as pheromone reactions or physical transformations.RemakeDerived from the abbreviation for "salaryman," this term refers to a genre that depicts office romances among coworkers set in corporate or office environments.