My question is about the words einzig ‘only, unique’, ein ‘a, one’, einzeln ‘single’, allein ‘alone, only’, ledig ‘single’ and einig ‘united’.
I’m always confused to use the words in a context. Do they have completely different usage or are they interchangeable from a specific point? And are there some other words that imply ‘a, single, one, unique’, except the ones I listed?
If these words refer to ‘one’, why do they have different usages?