Which psychiatrist added the words
introvert and extrovert to our daily discourse?
Etymology, Etymology, and more Etymology
as well as grammar, usage, euphemism, slang, jargon, semantics, linguistics, neologism, idiom, cant, and argot.

The critically-acclaimed board game
MooT
consists of tough questions about the nuances of the English language.
Answer:
Carl Jung
He also added the psychological senses of
the following: complex, collective unconscious, archetype, animus and anima,
and persona.
According to
writer/physician Anthony Daniels: "This is not the same as saying, however,
that he contributed to human knowledge: for it is perfectly possible to give
names to non-existent entities."
For
Daniel's further opinions on Jung, see
http://www.newcriterion.com/archive/22/nov03/jung.htm
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