The word "inscrutable" refers to something that is difficult to understand or comprehend, often due to its complexity or ambiguity. Therefore, the word closest in meaning to "inscrutable" involves a sense of mystery or enigma. Let's analyze the options:
- Transparent: This word implies clarity and ease of understanding, which is the opposite of "inscrutable."
- Mysterious: This word suggests something that is not easily understood or explained, often shrouded in mystery, aligning closely with "inscrutable."
- Predictable: This suggests that something can be easily anticipated and understood, which contradicts the meaning of "inscrutable."
- Defiant: This refers to being boldly resistant or disobedient, unrelated to the concept of being difficult to understand.
Based on the meanings of the provided options, the word "mysterious" is the one most similar to "inscrutable."