sophisticate

transitive verb -·cat′ed, -·cat′·ing

1. to change from being natural, simple, artless, etc. to being artificial, worldly-wise, urbane, etc.
2. to bring to a more developed, complex, or refined form, technique, level, etc.
3. Now Rare to make impure by mixture or adulteration
4. Archaic to corrupt or mislead

Etymology: ME sophisticaten < ML sophisticatus, pp. of sophisticare < L sophisticus: see sophistical

intransitive verb

Rare to use sophistical reasoning

noun

a sophisticated person