patternless
/ˈpætənlɪs/adjective
1- having no pattern; plain and undecorated无图案的; 无装饰的：
smooth, patternless paper for covering poor or uneven walls.
用来覆盖劣质或不平整墙壁的光滑无图案纸。
1.1
- forming no discernible pattern无定型的：
phenomena that are completely patternless and disorganized.
完全没有规则并且一片混乱的现象。