Correct spelling, explanation: nerve-racking and nerve-wracking essentially mean the same thing. Both terms are used to describe situations or experiences that are extremely stressful, anxiety-inducing, or tension-filled. Nerve-racking is the original spelling of this phrase, but nerve-wracking is a widely used and well-established variant spelling as well. Wrack is an archaic term that also refers to destruction or ruin, and it aligns with the idea of causing mental strain or distress.

Definition of nerve wracking:
Adjective, difficult to do and causes a lot of worry for the person involved in it
Waiting for the results of the medical tests was nerve-wracking, as each passing moment increased the anxiety.
The final round of the intense chess tournament proved to be nerve-wracking for the players, with the championship hanging in the balance.

Collocations with nerve wracking:
Some of the most commonly used collocations include:
1. Nerve-wracking decision: refers to a choice or decision-making process that is particularly stressful and anxiety-inducing.
Choosing between the two job offers was a nerve-wracking decision for him; both opportunities were appealing.
2. Nerve-wracking task: describes a challenging or difficult task that induces stress and tension.
Performing the high-wire act without a safety net was a nerve-wracking task for the acrobat.
3. Nerve-wracking competition: highlights the stress and pressure experienced by participants in a competitive situation, such as a spelling bee.
The spelling bee proved to be a nerve-wracking competition for the finalists, as the pressure mounted with each round.

Correct spelling, explanation: the terms nerve-racking and nerve-wracking have the same etymological origin and are essentially interchangeable in meaning. They both trace their roots to the concept of causing extreme stress or anxiety, particularly in relation to the nervous system. The word nerve-racking is formed by combining nerve and racking, with racking here meaning causing intense strain or distress. Rack has historical meanings related to torture devices or instruments of torment, and in this context, it’s used metaphorically to convey extreme tension or stress.