noun-modifying (irregular)
difficult to read; hard-to-read
Describes kanji, names, or text that are hard to read or decipher. Often used attributively (e.g., 難読漢字).
Many difficult-to-read kanji are used in this document.
I bought a book that collects hard-to-read place names.
obfuscation (of source code)
word with difficult-to-read kanji
Compound of 難 (difficult) and 読 (read).