sophisticated

The word “sophisticated” means having a lot of worldly experience and refined taste; cultured and knowledgeable. In plain terms, either refined and worldly (about people/taste) or advanced and complex (about technology).

Here is “sophisticated” used in a sentence: “She had a sophisticated palate after years of travel.”

“Sophisticated” is an adjective.

The word “sophisticated” comes from Medieval Latin. From Medieval Latin sophisticatus. The word originally meant "adulterated" or "not genuine" and only later came to mean "refined" or "worldly.".

“Sophisticated” is a fairly common word in modern English, usually learned at around the B2 level.

“Sophisticated” has 2 distinct senses listed in this dictionary. The most common is: having a lot of worldly experience and refined taste; cultured and knowledgeable.

Almost always. Applied to a person, "sophisticated" means having worldly experience and refined taste — cultured and knowledgeable. Very occasionally it can hint that someone is overly polished or has lost a certain innocence, but in everyday use it is high praise.

"Complicated" just means hard to understand or deal with, and often sounds negative. "Sophisticated" means highly developed or complex in an impressive, capable way: a sophisticated system is advanced by design, while a complicated one may simply be messy or confusing.

For people, the opposites are "unsophisticated," "naive," or "unworldly" — lacking refined taste or worldly experience. For technology and systems, the opposites are "simple," "basic," or "crude," meaning not highly developed.

Yes. Beyond describing cultured, worldly people, "sophisticated" is the standard word for anything highly developed or complex, especially technology — sophisticated software, sophisticated equipment, a sophisticated analysis. In that sense it signals advanced capability rather than refined taste.