tremor - A slight shaking movement, such as one caused by an earthquake or instability; also a subtle or faint sign of emotion, such as fear or excitement in the voice or body.

Because he was nervous, his voice had a significant tremor during the presentation.
nook - Small area or space, like an alcove, that is conducive to meditating, reading, relaxing or quietly reflecting.

The alcove at the large window made a perfect nook, where Gemma could quietly take time away from the family, to read her book or write in her journal without interruption.