ordinary
n.n. normal or usual, with nothing special or different about it. You use this to describe things that are common and not surprising.
n. possessing no special or distinctive features; normal or commonplace. Often used to describe things that lack status or exceptional quality.
It was just an ordinary day at the office.
The detective noticed that the suspect was wearing ordinary clothes to avoid standing out in the crowd.
While the exterior of the building looks quite ordinary, the interior features some of the most innovative architectural designs of the modern era.
From Anglo-Norman ordenarie, ordenaire et al., Middle French ordinaire, and their source, Medieval Latin ordinarius, noun use of Latin ōrdinārius (“regular, orderly”), from ōrdō (“order”).
Typically placed before the noun it modifies; can also follow a linking verb like 'be' or 'seem'.