IPA: /kənˈfaʊndɪd/
KK: /kənˈfaʊndəd/
Feeling confused or perplexed; unable to understand something clearly.
The confounded instructions left everyone scratching their heads.
Confounded is formed from "con-" (meaning together) and "found" (from Latin "fundare", meaning to establish or lay the foundation). The word originally described something that is established together, but has evolved to mean being confused or perplexed.
Think of things being 'established together' ('con-') leading to a state of confusion or being mixed up.