sustituir
/sustiˈtwiɾ/ · B2 · verb
to replace, to take the place of
🔄 sustituir = sus- (sub, under) + tuir: slip UNDER and take the place of
From Latin substituere: sub (under, in place of) + statuere (to set up). To substitute is to set something up in place of another. Sounds like English substitute, so the link is direct.