The Spanish verb 'pasar' (to pass) traces its origins back to the Latin word 'pandere', which meant 'to stretch or extend'. From this root, the Latin noun 'passus' meaning 'step' was derived. This then evolved into the Vulgar Latin verb 'passare' meaning 'to step or pass', which finally developed into the modern Spanish 'pasar'. You can see how the meaning evolved from the physical action of stretching or extending, to taking steps, and finally to the more general concept of passing or moving through.

Several common Spanish words are related to 'pasar', including: 'paso' (step), 'pasillo' (hallway/corridor), 'pasaje' (passage), and 'paseo' (walk/stroll). All these words share the basic concept of movement or passing through space, derived from the same Latin roots.

English speakers can easily connect 'pasar' to several similar English words that share the same Latin ancestry, such as 'pass', 'passage', 'passport', and 'passenger'. All these words retain connections to the original concepts of movement and traveling through space. The word 'pace' (as in walking pace) is also related, coming from the Latin 'passus' meaning 'step'.