The word "inscrutable" is defined as something that is difficult to understand or interpret. It implies that something is not easily comprehensible or is obscure in nature. Let's analyze the given options to find the one closest in meaning:
Therefore, the word closest in meaning to "inscrutable" is Mysterious.
Fill in the blank with the correct option.
The teacher believed that the student’s sudden lack of interest in class was an ..........., as he had always been enthusiastic and attentive.
Identify the part of the sentence that contains a grammatical error:
Each of the boys have submitted their assignment on time.