What does the word 'tremulous' mean?

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.