The benefit of creating such a massive key word in context index for the Wörterbuch der ägyptischen Sprache meant that instead of using an ad hoc translation method (guessing based on limited non-cultural context) for a language, which was passingly familiar, but not their mother tongue, Adolph Erman and others could consult a multitude of contexts for individual words and their various forms to provide more global context for better translations.
Other dictionaries like the Oxford English Dictionary attempt to help do this as well as provide the semantic shift of words over time because the examples used in creating the dictionary include historical examples from various contexts.