The Spanish word 'jara', meaning 'rockrose' (a type of flowering plant), traces its origins back to Classical Arabic. It comes from the Arabic word 'ša'rā'', which meant 'land full of vegetation'. This term evolved into Andalusi Arabic 'šá'ra', where its meaning became more specific, referring to the rockrose plant specifically. The word then entered Old Spanish as 'xara', maintaining the meaning of 'rockrose', and finally evolved into the modern Spanish 'jara'. This evolution shows how the meaning narrowed from describing vegetated land in general to specifically referring to one type of plant commonly found in such landscapes.

While 'jara' is a relatively simple Spanish word itself, it's worth noting that in modern Spanish, you might encounter related terms like 'jaral' (a thicket of rockrose plants) or 'jarilla' (a diminutive form referring to smaller varieties of the plant), though these are derived from 'jara' rather than being etymologically related through Arabic.

There aren't any common English words directly related to 'jara' through its Arabic etymology. In English, the plant is simply known as 'rockrose' or 'cistus', which have different etymological origins. This is because the Arabic influence on English vocabulary was much less direct than its influence on Spanish, which was under Arabic-speaking rule for several centuries.