Definition of frost-nail in English:

frost-nail

noun

Farriery
rare, historical
  • A nail with a large sharp head, inserted into a horseshoe in place of a regular nail to provide extra traction in frosty conditions.

verb

rare, archaic
  • with object To equip (a horse) with horseshoes which are fitted with frost-nails. Also with the horse's rider as object. In later use usually in pass. Compare "frost".

Origin

Middle English. From frost + nail<br>late 16th century. From frost-nail. Compare earlier nail.

Pronunciation

frost-nail

/ˈfrɒs(t)neɪl/