Meaning & use
clueless
Having no knowledge, understanding, or awareness of something obvious or important.
See it in a sentence
He was completely clueless about how to fix the printer jam.
The new intern seemed clueless about basic office etiquette on her first day.
A note on using this word
Clueless is informal and often implies the person should reasonably have known better.
Words with a similar meaning
ignorantuninformed
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
knowledgeable
Make it your own
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