The Spanish word 'lato' meaning 'wide' or 'broad' comes directly from the Latin word 'latus', which had the same meaning. This is a straightforward inheritance where both the form and meaning have remained remarkably stable from Latin to Spanish, with only minor phonetic adaptation.

Some related Spanish words include 'latitud' (latitude), which refers to the broadness or width of geographic measurement, and 'lateral' (lateral), referring to something on the side or width-wise. These words maintain the core concept of width or broadness from the same Latin root.

English speakers might recognize this root in words like 'lateral' (relating to the side), 'latitude' (geographic width), and 'dilate' (to make wider). All these words share the same Latin ancestor 'latus' and maintain some connection to the concept of width or broadness.