The Spanish verb 'casar' (to marry) has an interesting connection to housing and domesticity. It comes from the Latin word 'casa' meaning 'hut' or 'cottage'. When this word entered Spanish, it became 'casa' meaning 'house'. The verb 'casar' was then formed by adding the common Spanish verb suffix '-ar' to 'casa', essentially meaning 'to make a house together' or 'to establish a household', which naturally evolved to mean 'to marry'.

This etymology reflects how marriage has historically been connected to the concept of establishing a shared home, making the link between 'house' and 'marriage' quite logical in the development of this word.

The most obvious related Spanish word is 'casa' (house), which is actually the root word from which 'casar' was derived. This connection makes it easier to remember both words: when you 'casar' (marry), you typically establish a 'casa' (house) together. Other related words include 'casamiento' (marriage), 'casado/a' (married), and 'casero/a' (homemade, domestic).

While English 'casa' (as in 'mi casa es su casa') is borrowed directly from Spanish, English doesn't have many common native words related to this Latin root. However, we do use 'casino', which comes from Italian 'casino', a diminutive of 'casa', originally meaning 'small house' or 'summer house' before it evolved to mean a place for gambling. The word 'cassette' also ultimately comes from this Latin root, as it literally meant 'little box' or 'little house' for storing things.