acid-free

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Alkaline or neutral; not acidic.
    — an acid-free soil
  2. Without using acid.
    — an acid-free etching technique

词形变化

more acid-free comparative most acid-free superlative

词源

Etymology tree
Latin acidusbor.
French acidebor.
English acid
Proto-Indo-European *preyH-
Proto-Indo-European *-ós
Proto-Indo-European *priHós
Proto-Germanic *frijaz
Proto-West Germanic *frī
Proto-West Germanic *-frī
Old English -frēo
Middle English -fre
English -free
English acid-free
From acid + -free.
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