1. most timid, shy, or quiet in manner
Usage: superlative form of mousy
2. most resembling a mouse in appearance, especially having the dullest grayish-brown color
Usage: superlative form of mousy

Examples

• She was the mousiest girl in the entire class, barely speaking above a whisper.
• Of all her sisters, Emma had the mousiest hair color.
• The mousiest student surprised everyone by volunteering to give the presentation.
• Her mousiest outfit consisted of a dull brown sweater and gray skirt.
• Even the mousiest person can find their voice when they feel passionate about something.
• The decorator chose the mousiest shade of beige for the walls.