Her modest dress style is very churchgoing and appropriate for regular worshipers.

churchgoing 是由 church（教堂）和 going（去）组成的复合形容词，字面意思是"去教堂的"，引申为"适合教堂场合的"或"虔诚的"。这个词常用来形容符合宗教场合要求的衣着或行为举止。