1. Purchase → ownership: the cause-and-effect relationship supplies a ground for figurative use, with the relevant legal and intentional conditions.
2. “I set you free” → divorce: the original expression can refer to a derivative ruling in the stated case.
3. “I divorce you” → emancipation: the reverse transfer is not justified by the same mere-means relationship.
4. Gift/transfer/sale → marriage: allowed under a specified Hanafi contractual context, but marriage → literal sale/gift does not follow.
Each result depends on the initial meaning, the particular legal effect, the direction of transfer and the setting—not merely on a vague shared notion of “transfer.”