The Spanish verb 'imaginar' (to imagine) comes from the Latin verb 'imaginari', meaning 'to picture to oneself'. This Latin verb was derived from the noun 'imago', meaning 'image' or 'likeness'. The evolution from Latin to Spanish maintained both the form and meaning quite closely, with only minor changes to fit Spanish morphology.

Several common Spanish words share this Latin root, including 'imagen' (image), 'imaginación' (imagination), and 'imaginario' (imaginary). All these words preserve the core concept of mental pictures or visual representation from the original Latin 'imago'.

English speakers can easily connect 'imaginar' to several similar English words that share the same Latin ancestry: 'imagine', 'image', 'imagination', and 'imagery'. The connection is clear both in spelling and meaning, as all these words relate to mental pictures or visual representation. This shared etymology makes 'imaginar' particularly easy for English speakers to remember and understand.