Rose: Well, no language is easy to master but trust me, English is one of the least difficult ones.

I think having one word for a number of different meanings is a good thing for somebody who wants to learn the language. Imagine if you wanted to learn Czech. In your example, the 1 would be "zvyk", "zvyklost" or "obyčej" (depending on circumstances), 2 would be "clo" and 3 "zakázka". Plus there are more meanings of 'custom'. It can be a noun or an adjective. And all these have different words in Czech and in other languages.