Among others, I've heard the following words and their supposed origins:
- Beef: Comes from the french word "boeuf".
- Marmelade: Contraction of "Mary" and "malade" according to some story about a doctor using a mixture including oranges to treat Mary Queen of Scots.
- Mayday: Could come from the french expression "M'aider".
Is there a technical term to describe words like this that come from the gradual distortion of other words (either more ancient or of foreign origin)?