modest
adj.adj. not talking too much about your own skills or success. It can also describe something that is not very large, expensive, or fancy.
adj. having or showing a moderate estimation of one's own talents, abilities, or accomplishments. Also used to describe a quantity, size, or style that is relatively limited or unpretentious.
He is very modest about his high grades.
Despite her massive success in the tech industry, she lives in a modest apartment and drives an old car.
The architect proposed a modest expansion that would respect the original building's proportions rather than overwhelming the site with a grand, modern structure.
From Middle French modeste, from Latin modestus.
Typically used before a noun or after a linking verb like 'be' or 'seem'.