breadboard

The word 'breadboard' is a transparent compound from two Old English roots: 'brēad' (a morsel, piece of food, later specifically the baked staple) and 'bord' (a plank, flat surface). Its literal meaning, a board for slicing bread, emerged straightforwardly from the combination of its components. In the mid-20th century, its meaning expanded metaphorically within electronics. Hobbyists and engineers repurposed literal wooden breadboards as platforms for temporarily assembling and testing prototype circuits with components and wires, leading to the modern, specialized sense. This semantic shift exemplifies how a simple, functional object's name can be borrowed to describe a conceptually similar tool in a new technological domain.

Structure: bread + board - bread (Old English 'brēad'): The common food made from flour, water, and yeast. In this compound, it specifies the object's primary use or association. - board (Old English 'bord'): A flat, rigid piece of material, such as wood. In this compound, it denotes the physical object.