Dwesh is presented on this board as jealousy: concern that a valued connection, role or source of attention might be lost. Unlike envy of something another person has, this reflection centers on protecting something that feels important to you.
The snake from 16 leads to 4, Greed. Symbolically, fear of loss can become a wish for greater possession or control. It can also point toward a real breach of trust or an agreement that needs to be discussed. The square cannot tell those situations apart for you.
Separate what has happened from what you fear may happen. That can make it easier to ask for clarity, express a need or decide on a boundary without treating every uncertainty as proof.