أظفار المنية
The claws of death.
The claws point to an unstated predator and thereby make the image intelligible. This is not automatically ordinary reinforcement (tarshīḥ), where an already established metaphor is subsequently strengthened by a feature associated with its source.
If a brave person is explicitly called a “lion” and an additional feature of a lion follows, that feature may reinforce the metaphor. In “the claws of death,” however, no explicit “lion” or “predator” has been supplied. The claws themselves reveal the unspoken source. Indicating an absent source and reinforcing a stated borrowing are distinct operations.