Where does “замысловатый” come from?

замысловатый (Russian) comes from Russian замы́слить, from Russian мы́слить, from Proto-Slavic mysliti, from Proto-Slavic myslь, from Proto-Indo-European muHdʰ-.

Ancestry of “замысловатый”, step by step

Step	Language	Word	Meaning
1	Russian	замы́слить	—
2	Russian	мы́слить	to think
3	Proto-Slavic	mysliti	to think
4	Proto-Slavic	myslь	thought, idea
5	Proto-Indo-European	muHdʰ-	—

Every word from Proto-Indo-European muHdʰ- →

замысловатый — Etymology, Origin & Word History | Etymology Explorer