Complex

繁複 /繁复

fánfù

(intricate)

複 /复

fù

(in mathematics)

複雜 /复杂

fùzá

(not simple or straightforward)

建築群 /建筑群

jiànzhùqún

(collection of buildings)

情結 /情结

qíngjié

(psychologically based dislike or fear)

複合物 /复合物

fùhéwù

(in chemistry)