Achilles' Heel is a term used to describe a FATAL FLAW or WEAKNESS in someone or something. It originates from Greek mythology, where Achilles was a hero of the Trojan War who was invulnerable in all of his body except for his heel. The crossword solutions for this term are FLAW (4 letters), WEAKNESS (8 letters), FATAL (5 letters), SOFTSPOT (8 letters), WEAKSPOT (8 letters) and CHINKINTHEARMOR (15 letters). All of these words refer to a vulnerability or WEAKNESS that can be exploited.