What does the word "tantalize" most nearly mean?

The word "tantalize" means to tease or torment someone with the sight or promise of something unobtainable. In this context, "vex" is the most suitable synonym. To vex someone typically means to irritate, annoy, or frustrate them, which aligns closely with the feeling of being tantalized, as both involve a certain level of emotional discomfort stemming from desire or longing for something just out of reach.

The other choices do not fit the meaning of "tantalize" as closely. "Alleviate" refers to making something less severe or more bearable, which is opposite to the sensations of teasing or tormenting implied by "tantalize." A "ruse" is a trick or deceptive tactic, which does not capture the nuance of teasing or the emotional aspect of desire. Finally, "subordinate" refers to something that is lower in rank or position, which also does not relate to the concept of teasing or desire. Therefore, "vex" is the most relevant choice in this context.