Study for the SAT Vocabulary 2025 Test. Master vocabulary with flashcards and questions, each with detailed explanations. Get ready for your exam!

The word 'tremulous' specifically refers to something that is shaking or quivering slightly, often due to fear, anxiety, or weakness. This term conveys a sense of trembling that can be both physical, in terms of movement, or emotional, reflecting a state of nervousness or apprehension.

In contrast, the other options convey meanings that are significantly different. For example, bold and daring indicates confidence and fearlessness, while calm and steady suggests a state of tranquility and stability. Strongly assertive implies a forceful and confident demeanor, which is opposite to what 'tremulous' conveys. Therefore, the correct interpretation of 'tremulous' lies in its association with a slight shaking or quivering quality.