She bought some inexpensive children's clothes.

inexpensive 由前缀 in-（表示"不"）和形容词 expensive（昂贵的）组成，字面意思是"不昂贵的"，即"价格便宜的"。 inexpensive 通常带有褒义，强调价格实惠但质量尚可，比单纯说"cheap"更正面。