Using this technique a foreign word is connected acoustically and visually with a code-word. Connect the code-word by a pictorial idea with the meaning of the vocabulary item. Pato , the spanish word for duck, sounds similarly like the english word pot.
Pot therefore is the code-word for pato .
You can imagine a duck which swims in a pot or runs around with a little pot on the head. Although the Code-Word System is superior to other mnemonics, occasionally there were doubts that it promotes a basic understanding. Perhaps you should reserve this technique for the words which refuse most obstinately being learned by you.