This is The order of adjectives (លំដាប់គុណនាម):
Opinion (គំនិត): nice, excellent, lovely...
Size (ទំហំ): large, long, short...
Quality (គុណភាព): clear, busy, quiet...
Age (វ័យ): old, new, ten-year-old...
Shape (ទ្រង់ទ្រាយ): round, flat, wide...
Colour (ពណ៌): red, blue, green...
Participle form: covered, broken, missing...
Origin (ប្រភព): British, Italian, American...
Material (សម្ភារៈ): brick, paper, wooden...
Type (ប្រភេទ): human, domestic, chemical...
Purpose + Noun: alarm clock, tennis court, walking boots...
- Follow above rule (អនុវត្ត Rule ខាងលើ): A hard wooden seat
- Short Adjective + Long Adjective (គុណនាមខ្លី + គុណនាមវែង): A big horrible building
- Old/young + noun of people : A pale young man