What does a "traitor" do?

A "traitor" refers to someone who betrays a trust or betrays a person, a group, or a cause. This term often carries a strong connotation, as it implies a deep level of disloyalty or treachery. In contexts such as politics, personal relationships, or conflicts, a traitor undermines the expectations of loyalty or fidelity that might exist between entities. The essence of being a traitor is that the individual acts against the interests or allegiance they previously upheld, leading to a rupture of trust.

The other options do not capture this fundamental aspect of betrayal. Encouraging others or leading a team typically involve positive actions that promote support and unity, whereas supporting a cause reflects commitment rather than disloyalty.