A more thorough explanation:

A killer amendment is an amendment that can completely destroy a proposed law or bill. It is called a "killer" because it can effectively kill the entire proposal.

Killing by misadventure refers to a death that occurs accidentally, often as a result of risky behavior or a dangerous situation. For example, if someone dies while participating in an extreme sport, it may be considered killing by misadventure.

Killing with malice refers to a deliberate and intentional act of killing someone. This can include murder or manslaughter, depending on the circumstances surrounding the death.

Kin refers to a person's relatives or family members. This can include blood relatives, as well as those related through marriage or adoption. For example, a person's parents, siblings, and grandparents are all considered kin.

These examples illustrate the different meanings of the term "killer amendment" and related terms such as "killing by misadventure" and "killing with malice." The example of kin shows how the term can be used in a different context to refer to family members.