viper, adder, any venomous snake in the family Viperidae, but especially the common European adder (Vipera berus)
Frequency
Etymology
Inherited from Ottoman Turkish انكرك (engerek, “adder”), from Greek εγχελάκι (encheláki), itself a diminutive of Ancient Greek ἔγχελυς (énkhelus, “eel”).