Which word means to prevent an occurrence, realization, or attainment?

The term that denotes the act of preventing an occurrence, realization, or attainment is "thwart." This word specifically implies actively hindering or blocking someone or something from achieving a particular goal or cause. In contexts where obstacles or interference play a role in the failure to achieve an outcome—whether in plans, projects, or personal ambitions—using "thwart" accurately captures that essence of prevention.

The other terms have distinct meanings that do not align with this concept. "Transgress" refers to violating a boundary or a moral law, which does not imply prevention. "Succinct" describes something that is expressed clearly and in a few words, without any connotation of hindering or prevention. "Sublime" relates to something that inspires great admiration or awe, also lacking any sense of blockage or prevention. Thus, in the context of preventing an occurrence or achievement, "thwart" is the most appropriate choice.