is a figure of speech in which a part is made to represent the whole or vice versa. It is often used for poetic effect to give a more profound, , or expansive quality to ordinary speech or .

‘All on deck' uses ‘' to represent the sailors themselves, emphasizing their role in the labor of the ship.

Referring to a car as ‘wheels,' highlights the vehicle by referring to it as one of its essential parts.

‘Don't get your meat where you get your bread' is a double that advises against workplace romance.

can enhance your speeches by adding layers of meaning and inspiring your audience to think beyond the literal words.