The Spanish verb 'abrir' meaning 'to open' comes directly from the Latin verb 'aperire', which had the same meaning. Over time, as Latin evolved into Spanish, the pronunciation and spelling shifted from 'aperire' to 'abrir', but the core meaning of opening or making accessible remained unchanged.

Several common Spanish words are related to 'abrir', including: 'abierto' (open/opened), which is the past participle of 'abrir'; 'abertura' (opening/gap), which preserves more of the original Latin spelling; and 'apertura' (opening/beginning), which is even closer to the Latin root.

English speakers might recognize the connection to words like 'aperture' (an opening, especially in a camera lens), 'aperitif' (an alcoholic drink taken before a meal to 'open' the appetite), and 'overt' (open and obvious). All these words trace back to the same Latin root 'aperire'.