commonplace
adj.adj. something that is very common and not special or surprising. You use this when you want to say an idea or object is ordinary.
adj. ordinary, usual, or lacking originality; widely encountered and therefore not remarkable. Often used to describe ideas, opinions, or objects that have lost their novelty through frequent repetition.
It is a commonplace idea that exercise is good.
The manager dismissed the suggestion as a commonplace complaint heard every week.
What was once considered a radical theory has become a commonplace assumption in modern physics.
A calque of Latin locus commūnis, referring to a generally applicable literary passage, itself a calque of Ancient Greek κοινὸς τόπος (koinòs tópos).
Can also function as a noun referring to a trite remark or a widely accepted opinion.