justificar
/xustifiˈkaɾ/ · B2 · verb
to justify
⚖️ justi + ficar = make just (Latin justus + facere)
From Latin iustificare: iustus (just, right) + facere (to make). To justify something is to show that it is right. The ending -ficar is the same one found in clarificar and simplificar.