Costively is an adjective that describes a situation where something is slow-moving or sluggish. There are several synonyms that can be used in its place, including obstinate, stubborn, reluctant, hesitant, or unwilling. These words can describe a variety of behaviors, from a person's unwillingness to change their mind or habits to a business's slow adoption of new technologies or strategies. They can also be used to describe physical movements or conditions, such as constipation or other digestive issues. By using synonyms for costively, writers and speakers can add nuance and variety to their language, making their communication more effective and engaging.