Which of the following words is an antonym for 'ghastly'?

The word 'ghastly' describes something that is shocking, frightful, or extremely unpleasant. In this context, an antonym would be a word that conveys the opposite meaning. 'Pleasant' fits this definition, as it signifies something enjoyable, agreeable, or delightful, contrasting sharply with the negative connotations of 'ghastly.'

The other words listed, such as 'gruesome,' 'appalling,' and 'frightful,' all evoke a sense of horror or disgust that aligns closely with the meaning of 'ghastly.' Thus, they cannot serve as antonyms. Recognizing the meaning of 'ghastly' is crucial for understanding why 'pleasant' stands out as the term that expresses an entirely different feeling, making it the correct choice.