upp á hár

Icelandic

Etymology

Literally, “onto the tip of a hair”; compare English spot-on.

Phrase

upp á hár

  1. (as in "að vita eitthvað upp á hár") to know something perfectly
    Ég kunni þetta upp á hár. ― I knew this material perfectly.
    Hann vissi upp á hár hvernig ætti að bregðast við. ― He knew exactly how to react.
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