yeokrin
the reverse scale (a metaphor for a person's weak point or vulnerability)
l'échelle inversée (une métaphore pour le point faible ou la vulnérabilité d'une personne)
그의 역린을 건드리지 마세요.
geuui yeonglin-eul geondeuriji maseyo.
Don't touch his reverse scale.
More words starting with 역