1
seal sth with a wafer
wafer 在此指旧时封缄信件用的胶质小圆片，与“威化饼干”的义项不同。
He sealed the envelope with a wafer.
他用一片封缄纸片封好了信封。
封缄纸片；干胶片
先理解核心含义，再看它在真实句子里的用法。
封缄纸片；干胶片
a small adhesive disk of paste used to seal letters
He sealed the envelope with a wafer.
他用一片封缄纸片封好了信封。
旧时用语
轻薄扁平的饼干。
A light, thin, flat biscuit/cookie.
用于封信的小粘贴圆片
a small adhesive disk of paste; used to seal letters
圣餐中使用的祝圣无酵薄饼。
A thin disk of consecrated unleavened bread used in communion.
小而薄脆的蛋糕或饼干
a small thin crisp cake or cookie
The kids dipped the chocolate wafers into the warm milk.
孩子们把巧克力威化饼干蘸进温牛奶里。
Gently place a wafer on top of the cake before serving.
上桌前轻轻地把一片威化饼干放在蛋糕上。
Each wafer is so thin and crispy that it breaks easily.
每一片威化饼干都又薄又脆，很容易碎。
wafer 在此指旧时封缄信件用的胶质小圆片，与“威化饼干”的义项不同。
He sealed the envelope with a wafer.
他用一片封缄纸片封好了信封。
此结构用介词 of 引出材质，意为“一片……制成的封缄纸片”。
A wafer of paste was pressed onto the folded paper.
一片糊状胶被压在折叠的纸上。
Not this
I ate wafer for dessert.
Use this
I ate a wafer for dessert.
Wafer（威化饼干）是可数名词，指一块薄脆饼；汉语说“吃威化饼干”时可以不用量词，但英语中可数名词单数不能裸用，必须说 a wafer 或用复数 wafers。
Not this
I bought a packet of waffles as a snack.
Use this
I bought a packet of wafers as a snack.
Wafer（威化饼干，薄脆饼）和 waffle（华夫饼，格子饼）是两种不同的食物，拼写和读音相近但意思不同；如果想表达“威化饼干”这类零食，应该用 wafer。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
封缄片
The stationer's drawer was full of sealing wafers.
文具商的抽屉里装满了封缄片。
用封缄片封住信件
He wafered the letter and handed it to the courier.
他用封缄片封住信件，然后把它交给了信使。
用封缄片封口的信封
She received a wafered envelope from her lawyer.
她收到了一个用封缄片封口的信封。
极微弱的多数优势
The party won the election by a wafer-thin majority.
该党以极其微弱的多数优势赢得了选举。
薄如威化饼；非常薄
The ice on the pond was as thin as a wafer.
池塘上的冰薄得像威化饼一样。
它只是一片薄薄的威化薄荷糖。
In Monty Python's film The Meaning of Life, a diner explodes after being given a wafer-thin mint.
在蒙提·派森的电影《人生的意义》中，一位食客在吃下一片薄薄的威化薄荷糖后爆炸了。
Use wafer naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
读音像“维佛”，联想薄薄的“威化”饼干就是wafer；同样薄薄一片、旧时封信用的小干胶片也叫wafer。
语域：mixed 常见场景：historical letters and documents、archival research、antique stationery 此义项指旧时封缄信件或文件的小干胶圆片，属于历史用语，现代英语中不常见。多出现在历史文献、档案研究或描述旧时书信文具的语境中；语体上带有书面或正式色彩，口语中很少使用。
wafers
Dictionary facts from ECDICT, WIKTIONARY.