أَنَّى لَكِ هَذَا
From where has this come to you?
Here 'from where' is the natural reading, while other occurrences foreground manner. The discussion shows that the interpretation of a flexible interrogative is fixed by its complements, accompanying verb and context.
Treating annā, ayna and min ayna as exactly identical obscures the difference between a source and a location. Conversely, restricting annā to origin alone fails to account for its attested meaning of manner.
ExpressionCore issueKind of response
Kayfa ṣanaʿta hādhā?How was it done?Manner
Ayna hādhā?Where is it?Location
Annā laki hādhā?Where did it come from?Source
Faʾtū ḥarthakum annā shiʾtumAs you wishManner