Undecipherable handwriting or secret symbol.
Any symbol used in this system; a hieroglyph.
A writing system of ancient Egypt, Minoans, Maya and other civilizations, using pictorial symbols to represent individual sounds as a rebus
difficult to decipher
of, relating to, or written with this system of symbols
Any of a set of things that cannot be distinguished.
Not capable of being perceived or known.
Not distinguishable; not capable of being perceived, known, or discriminated as separate and distinct