clueless

Meanings

1. 1
   adj

   having no knowledge or understanding of a situation or subject

   I was clueless about how the machine worked.

2. 2
   adj

   providing no clues or useful guidance

   The clueless note gave us no idea where to meet.

Formed in English from clue and the suffix -less, literally “without a clue.” Its common modern sense of being uninformed developed from the idea of lacking information needed to solve a problem.

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