English

Alternative forms

• needle-in-a-haystack

Noun

needle in a haystack ‎(uncountable)

1. (idiomatic) Something that is difficult or impossible to locate; something impossibly complex or intractable.

   You'll never find the paper you need on her desk. You're looking for a needle in a haystack.

Synonyms

• needle in a straw poll

Translations

References

• usingenglish.com idioms reference
• thefreedictionary.com definition