"Concentred" Natural Recordings by Native Speakers
The word "concentred" is the past participle of the verb "concentrate", which means focused or directed towards a specific point or idea. A concentrated effort or attention means that one is giving one's full attention to something. In other words, something that is concentrated is intense, thorough, and zeroed in on a particular aim or objective.
Concentrates is a noun that refers to a substance that has a high percentage of a particular chemical or substance, often used as a raw material or ingredient in a manufacturing process or product. It can also refer to a person who focuses their attention and mental effort on a particular task or activity.
In geometry, "concentrically" refers to the relationship between two or more circles or curves that share the same center. In other words, they have the same midpoint, and their radii (the distance from the center to the edge) are the same length. Concentric shapes or figures have the same center, but may differ in size or radius.