intermediate

nouns

a substance formed during a chemical process before the desired product is obtained
is a type of (narrower)
material produced by or used in a reaction involving changes in atoms or molecules

verbs

act between parties with a view to reconciling differences
"He interceded in the family dispute"; "He mediated a settlement"
is derived from
is derived from

adjectives

lying between two extremes in time or space or state
"going from sitting to standing without intermediate pushes with the hands"; "intermediate stages in a process"; "intermediate stops on the route"; "an intermediate range plane"
antonym
is similar to
intermediate in character or position
"a grey area between clearly legal and strictly illegal"
is similar to
at a point midway between two extremes
"at the halfway mark"
is similar to
being 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"
is similar to
used of the third or next to final year in United States high school or college
"the junior class"; "a third-year student"
is similar to
next to the last
"the author inadvertently reveals the murderer in the penultimate chapter"; "the figures in the next-to-last column"
is similar to
used of the second year in United States high school or college
"the sophomore class"; "his sophomore year"
is similar to
near but not precisely at an end
"a subterminal band of color on the tail feathers"
is similar to
third from last
around the middle of a scale of evaluation
"an orange of average size"; "intermediate capacity"; "medium bombers"