not able to make heads nor tails (out) of (something)

not able to make heads nor tails (out) of (something)

Failing or unable to understand, decipher, or make sense (of something). We tried identifying the hieroglyphs on the ancient tablet, but they were so archaic that we weren't able to make heads nor tails of it. See if you can figure out what this contract is saying—I wasn't able to make heads nor tails out of all that legal mumbo jumbo.
See also: able, head, make, nor, not, of, tail
Farlex Dictionary of Idioms.
See also:
  • not able to make heads or tails (out) of (something)
  • not able to make head nor tail (out) of (something)
  • not able to make head or tail (out) of (something)
  • not able to make head or tail of
  • can't make heads nor tails of (someone or something)
  • not able to make anything out
  • not able to make anything out (of something)
  • can't make anything out (of something)
  • be another of life's great mysteries
  • an open book