the.com/stiletto heel

means A very thin, high heel on a shoe, typically narrowing to a point as small as a pencil tip at the ground.

from Named after the stiletto, a slender, narrow-bladed knife — itself from Italian 'stiletto,' a diminutive of 'stilo' (dagger), tracing back to Latin 'stilus,' the pointed writing instrument that also gives us 'style.' The heel borrowed the knife's name sometime in the mid-20th century, when shoe design shrank the heel's base down to a thin, blade-like spike — the comparison was simply too apt to resist. So the word's whole journey runs from a tool for writing, to a weapon for stabbing, to a heel for walking — form following a very old, very sharp idea.