centre
cen-tre
noun
The exact middle point or part of an object, area, or group.
"The city centre was very busy."
verb
To place something in the middle, or to focus attention on a main point.
"Please centre the image on the page."
Thesaurus
Synonyms: center, nerve centre, nerve center, marrow, meat, heart, heart and soul, inwardness, nitty-gritty, essence, nub, kernel