wafer
/ˈweɪfə(r); `wefɚ/ n
1 very thin crisp sweet biscuit 威佛饼乾（薄而脆的甜饼乾）
an ice-cream wafer, ie for eating with ice-cream 冰激凌威佛饼乾（与冰激凌同吃的）.
2 small round piece of unleavened bread used in Holy Communion 圣饼（用作圣餐的小圆饼）.
3 small round piece of red paper stuck on the back of a document instead of a seal, to show that it is official 封缄纸（红色圆纸片, 贴在文件背面代替封印）.