(n)center, centre, middle, heart, eyean area that is approximately central within some larger region“it is in the center of town”, “they ran forward into the heart of the struggle”, “they were in the eye of the storm”
(a)middleof a stage in the development of a language or literature between earlier and later stages“Middle English is the English language from about 1100 to 1500”, “Middle Gaelic”
(s)in-between, mediate, middlebeing neither at the beginning nor at the end in a series“adolescence is an awkward in-between age”, “in a mediate position”, “the middle point on a line”