Firm or hard: Not easily bent or moved: If you are stiff or part of your body is stiff….

If a doorknob is stiff, it won't turn smoothly, and if the smile on your face is stiff, it’s frozen and unnatural looking. When a person is stiff, they are artificial and unrelaxed †unless they're scared stiff or … Stiff, the least specific, refers to what can be flexed only with difficulty (a brush with stiff bristles); With reference to persons it often suggests a lack of ease, cold formality, or fixity, as of purpose: Stiff in …

Stiff in …