Which term most nearly resembles the meaning of "oppressive"?

The term "oppressive" is most closely associated with the idea of cruelty, harshness, or the imposition of severe power or authority over others. Therefore, "tyrannical" is the word that aligns best with this concept, as it refers to a form of cruel and arbitrary governance, where power is enforced in a domineering manner. In this context, both terms signify the use of power in an unjust or burdensome way, making "tyrannical" a fitting synonym for "oppressive." The other options—comforting, supportive, and encouraging—contrast strongly with this idea, as they connote a sense of help, care, or positive reinforcement rather than harshness or domination.