Given to or marked by self-restraint and reticence: a reserved person. re·serv′ed·ly (-zûr′vĭd-lē) adv. re·serv′ed·ness n.

Is there such a word as Reservedness?

noun The character of being reserved; closeness; lack of frankness, openness, or freedom.

What is a fancy word for shy?

Some common synonyms of shy are bashful, coy, diffident, and modest. While all these words mean "not inclined to be forward," shy implies a timid reserve and a shrinking from familiarity or contact with others.