Shiest is a term that describes someone who is extremely timid or lacks self-confidence. Some common synonyms for this word include bashful, coy, diffident, hesitant, modest, retiring, and sheepish. These words all convey a sense of unease or discomfort when interacting with others or participating in social situations. Other synonyms for shiest include introverted, apprehensive, reserved, shy, timorous, and withdrawn. These words are commonly used to describe individuals who are reticent, quiet, and may struggle to speak up or express themselves in group settings. Though the terms have slightly different connotations, they all point to a type of social anxiety or discomfort when interacting with others.