unexplained

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Not explained; of unknown cause or origin. not-comparable
    — Why this already very fast train should be speeded up still further, when none of the other more easily timed S.R. West of England trains has a single minute pared from its schedule, is unexplained - unless this is a playful dig at the Western Region, most of whose expresses, by reason of additional stops, will be decelerated from the same date.

词源

Etymology tree
English un-
English explained
English unexplained
From un- + explained.
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