confundir
/konfunˈdiɾ/ · B1 · verb
to mistake, to confuse, to mix up
🔀 con + fundir = to fuse together, melt things into one: you can't tell them apart
From Latin confundere, to pour together. Fundir means to melt or fuse, as in a foundry. When two things get poured into one, you mix them up. English confuse and confound come from the same root.