In the sentence provided, the word "lamentable" most likely means "regrettable." Here's why:
1. Lamentable is used to describe something that is unfortunate, sorrowful, or regrettable.
2. In the context of the sentence, the occasion of Davin's grandfather's death is described as lamentable, which indicates that it was a sad and regrettable event.
3. The word "lamentable" is often associated with expressing grief or sorrow over something that is unfortunate or disappointing.
Therefore, in the sentence given, the most suitable meaning for "lamentable" would be "regrettable," reflecting the sadness and concern Davin feels about his grandfather's death and his worry for his grandmother's well-being.
