• n. 蝰蛇（欧洲产的小毒蛇）；加算器；猪鼻蛇（北美产无毒的）

来自古英语a naeddre 错切分成an aedder(双元音ae后变为a).可能最终来自词根sna, 游动，同snake,字母s脱落。

adder

adder: [OE] In Old English, the term for a snake (any snake, not just an adder) was nǣddre; there are or were related forms in many other European languages, such as Latin natrix, Welsh neidr, and German natter (but there does not seem to be any connection with the natterjack toad). Around the 14th century, however, the word began to lose its initial consonant. The noun phrase including the indefinite article, a nadder, became misanalysed as an adder, and by the 17th century nadder had disappeared from the mainstream language (though it survived much longer in northern dialects).

adder (n.)

Old English næddre "a snake, serpent, viper," from Proto-Germanic *nædro "a snake" (cognates: Old Norse naðra, Middle Dutch nadre, Old High German natra, German Natter, Gothic nadrs), from PIE root *netr- (cognates: Latin natrix "water snake," probably by folk-association with nare "to swim;" Old Irish nathir, Welsh neidr "adder").

The modern form represents a faulty separation 14c.-16c. into an adder, for which see also apron, auger, nickname, humble pie, umpire. Nedder is still a northern English dialect form. Folklore connection with deafness is via Psalm lviii:1-5. The adder is said to stop up its ears to avoid hearing the snake charmer called in to drive it away. Adderbolt (late 15c.) was a former name for "dragonfly."

1. He is as deaf as a post [ stone , door - post , door - nail , an adder ].

他完全聋 了.

来自《现代汉英综合大词典》

2. The adder is Britain's only venomous snake.

蝰蛇是英国唯一的一种毒蛇。

来自辞典例句

3. By far the most common snake in Britain is the adder.

在英国最常见的蛇是蝰蛇.

来自中级百科部分

4. The adder is also the only British snake with a poisonous bite.

蝰蛇在英国也是唯一一种有毒的蛇.

来自中级百科部分

5. Why, thou art as foul as the toal, and as loathsome as the adder.

看啊, 你跟蟾蜍一样地难看, 跟毒蛇一样地可恶.

来自辞典例句