Which of the following terms would best describe a person who tends to get embroiled in disputes?

The term that best describes a person who tends to get embroiled in disputes is "embroll." This word specifically relates to becoming involved in arguments or conflicts, highlighting a propensity to engage in contentious situations. The root of the word suggests entanglement or complicating matters, which directly aligns with the idea of being embroiled in disputes.

In contrast, the other choices do not convey the specific meaning of involvement in disputes. "Engager" implies a person who actively participates in activities but does not inherently suggest conflict. "Advocator" refers to someone who supports or speaks in favor of a cause, which might imply dispute but does not capture the essence of being embroiled in conflict. "Involved" is a broad term that indicates participation but lacks the connotation of contention or argumentation associated with being embroiled. Therefore, "embroll" precisely encapsulates the idea of getting caught up in disputes, making it the most suitable choice.