trouble-free

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Without trouble. not-comparable
    — The construction of the bridge was trouble-free.

词源

Etymology tree
English trouble
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 trouble-free
From trouble + -free.
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