乱雑

1. Origins, structure, and basic meaning

• Structure: 乱雑 is read as らんざつ and is a な-adjectival noun for objects or writing being messy and disorganized.
• Basic usage: Use 乱雑に積む adverbially and 乱雑な文字 attributively with な.

2. Common pitfalls and similar expressions

• Arrangement and handwriting
  • Documents can be piled without order, while handwriting can have rough, disorderly forms; the same word evaluates different targets.
• Messy does not mean illegible
  • 乱雑な文字 may still be readable, so disorder does not necessarily imply complete illegibility.