This phrase is used as a metaphor for a seemingly small but fatal weakness or a vulnerable point. It comes from Homer's mythical Greek hero Achilles, whose mother Thetis plunged him into the River Styx when he was a baby, thus making his body invulnerable except for the heel by which she held him. Later he was killed by an arrow wound to his heel. Although the legend is ancient, the phrase wasn't picked up in English until the nineteenth century.

Übersetzung:

Achillesferse

Gegenteil(e)

The opposite of "Achilles' heel" is "invulnerability".

Synonym(e):

You could also say: a vulnerable point.