Sentence:  <WSD>Gyarumoji</WSD> (gal characters) are designed to hinder the decoding of text by those not in the know. They usually take the form of an unusual mixture of scripts  (e.g. Japanese, the alphabet, Roman numerals, the Greek alphabet) with typographic, mathematical, and other symbols 
Meaning of the word marked with <WSD> tags:  A form of cryptic Japanese writing that substitutes similar-looking characters for the characters intended