Tremulousness

He couldn't hide the tremulousness in his hands as he held the precious artifact.

The actress felt a sense of tremulousness before going on stage for her debut performance.

The young child's tremulousness was evident as he approached the big, barking dog.

Her hands betrayed her tremulousness as she prepared to take the driving test.

The climber's tremulousness increased as he reached the peak of the mountain.

With tremulousness, she confessed her feelings to him.