костлявых

In a sentence

• Я избегаю костлявых собак на улице.

  I avoid bony dogs on the street.

  In this sentence, 'костлявых' describes dogs that are unusually thin or emaciated, using the adjective in its descriptive form.

• Портрет старика был как образ костлявых рук судьбы.

  The old man's portrait was like an image of the bony arms of fate.

  Here, 'костлявых' metaphorically describes the thin and skeletal-like arms, enhancing the imagery.

• Он боялся тех костлявых фигур, которые вспоминал перед сном.

  He feared those bony figures he recalled before sleep.

  The word 'костлявых' is utilized to characterize imaginary figures as thin or skeletal in a possibly eerie or unsettling context.