hoar frost

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hoar frost

  • /ˈhɔː fɹɒst/ UK
  • /ˈhoɹ ˌfɹɑst/ US

Where it comes from

PIE word

*prustós

From Middle English hore frost, horfrost [and other forms], from hor (“grey; greyish-white”, adjective) (from Old English hār (“grey”), ultimately from Proto-Indo-European *(s)ḱeh₃- (“darkness; shadow”)) + frost (“cold spell, freezing weather, frost; hoar-frost; rime”) (from Old English frost, forst, ultimately from Proto-Indo-European *prustós (“frost”)). The English word is analysable as hoar (“greyish-white; white”, adjective) + frost.

noun hoar frosts · hoarfrost · hoar-frost

  1. countable, uncountable Originally, any frozen dew forming a white deposit on exposed surfaces. He [the Lord] geueth ſnowe like woll, & ſcatereth yͤ horefroſt like aſhes.

    Similar: white frost

  2. countable, specifically, uncountable Water vapour which has undergone deposition or desublimation (“transformation directly into ice crystals without first turning into liquid water”) when the air is cold and moist to form a white deposit on exposed surfaces. On Sunday night, January 23, ſeveral things vvere laid out at the Obſervatory, ſuch as ſheets of brovvn paper, pieces of boards, plates of metal, glaſſes of ſeveral kinds, &c. vvhich all began to contract hoar-froſt ſeemingly as ſoon as each body had time to cool dovvn to the temperature of the air.

Translations

Every language

noun any frozen dew forming a white deposit on exposed surfaces; water vapour which has undergone deposition or desublimation (“transformation directly into ice crys

Españolescarcha, helada blanca, cencellada
한국어흰 서리 huin seori
日本語霜 shimo
中文霜 shuāng
हिन्दीतुषार tuṣār
Portuguêsgeada, escarcha
Françaisgelée blanche, givre
DeutschRaureif
Italianobrina, calaverna
Ελληνικάπάχνη páchni
Românăchiciură, promoroacă, brumă
Русскийи́зморозь ízmorozʹ, и́ней ínej
Tiếng Việtsương muối
العربيةصَقِيع ṣaqīʕ
עבריתכְּפוֹר kfor

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Cite this
MLA

"hoar frost." Wiktionary, via Micwyn, micwyn.com/word/hoar%20frost. Accessed 6 Nov. 2026.

APA

hoar frost. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/hoar%20frost

Chicago

"hoar frost." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/hoar%20frost.

BibTeX
@misc{hoar_frost_2026,
  title = {hoar frost},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/hoar%20frost},
  urldate = {2026-11-06}
}