permafrost

名词 n.
中文释义
英 /ˈpɜːməˌfɹɔst/    美 /ˈpɝməˌfɹɔst/

英文释义

名词 n.
  1. Permanently frozen ground, or a specific layer thereof. countable,uncountable
    — Nevertheless, the water molecule is present, as ice, in a solid form in frozen soils or permafrosts, which cover large regions characterised by a polar climate.

词形变化

permafrosts plural

词源

Etymology tree
Proto-Indo-European *per-der.
Proto-Italic *peri-
Latin per-
Proto-Indo-European *men-der.
Proto-Italic *monēō
Latin maneō
Latin permaneōlbor.
Middle French permanentbor.
English permanentclip.
English perma-
Proto-Indo-European *prews-
Proto-Indo-European *-tós
Proto-Indo-European *prustós
Proto-Germanic *frustaz
Proto-West Germanic *frost
Old English frost
Middle English frost
English frost
English permafrost
From perma- + frost.
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