An Impossible Task Is One of These in a Haystack

Word Meaning:

NEEDLE — A long, thin, sharp implement usually for piercing as in sewing, embroidery, acupuncture, tattooing, body piercing, medical injections, sutures, etc; or a blunt but otherwise similar implement used for forming loops or knots in crafts such as darning, knitting, tatting, etc.

Definitions from Wiktionary.