The Spanish word 'interdepartamental' (meaning 'interdepartmental') is constructed from several elements. It starts with the Latin prefix 'inter-' meaning 'between', combined with 'departamento' (meaning 'department') and the Spanish adjective suffix '-al'.

The word 'departamento' itself comes from the French 'département', which was formed from the prefix 'dé-' (indicating separation), the verb 'partir' (meaning 'to divide'), and the noun suffix '-ment'. This etymology reflects how departments were originally created by dividing or partitioning larger organizations or territories into smaller administrative units.

Some simpler related Spanish words include 'departamento' (department), which is very commonly used to refer to both administrative divisions and physical sections or units. You might also encounter 'partir' (to split or leave), which shares the same French origin and reflects the concept of division or separation.

The English cognate 'interdepartmental' is almost identical to the Spanish word, making it easy to remember. Both languages borrowed these elements from the same Latin and French sources. Other related English words include 'department' and 'partition', the latter coming from the same Latin root as French 'partir'. The prefix 'inter-' appears in many English words like 'international', 'interact', and 'intervene', always carrying the meaning of 'between' or 'among'.