adder
UK[ˈædə(r)]US[ˈædər]
n
A small, venomous snake of the viper family, common in northern Europe and northern Asia.
n
(North American) Any of various non-venomous snakes, such as the hognose snake.
Etymology
The word 'adder' originates from the Old English 'nædre', meaning 'serpent, snake'. This term descended from the Proto-Germanic 'nædro', which itself traces back to the Proto-Indo-European root 'nətr-', also meaning 'snake'. The modern form 'adder' arose from a linguistic process called rebracketing or juncture loss, where the phrase 'a nadder' was misheard and reanalyzed as 'an adder'. This shift illustrates how article-noun boundaries can reshape a word's form over centuries, while its core meaning related to a serpent has remained remarkably stable.
Analysis
The word 'adder' is a simplex word derived from a single, indivisible root in Old English. It does not contain separable modern morphemes.
Examples
The common European adder is the only venomous snake found in Britain.
Be careful walking through the heath; you might disturb an adder basking in the sun.
In some regions, the harmless hognose snake is mistakenly called a puff adder.