He neatly folded his napkin and placed it beside his plate after the meal.

napkin 是名词，指用餐时用来擦拭嘴和手的布或纸制品，即"餐巾"或"餐巾纸"。这个词来自古法语 nape（桌布）加上表示"小"的后缀 -kin，字面意思是"小桌布"。