complex
adjectiveUK /ˈkɒm.pleks/
US /kəmˈpleks/
Something complex has many parts and is hard to understand.
The puzzle was too complex for me to solve quickly.
RELATED WORDS
OTHER MEANINGS
2. A group of buildings or rooms that are connected or used together.
They live in a large apartment complex near the park.
3. A group of closely connected feelings or ideas in a person's mind.
He has a complex about speaking in front of crowds.
4. In chemistry, a compound formed by a metal joined to other molecules.
The scientist studied a metal complex in the lab.