Use 'unimaginably' to emphasize extremes in descriptions that are beyond normal experiences. He was unimaginably rich, owning private jets and islands.
Pro Tip 2/3
Not Literal
'Unimaginably' is often not literal; it expresses something difficult to grasp, not truly impossible to imagine. The pain she felt was unimaginably intense, though one could try to empathize.
Pro Tip 3/3
Emotional Impact
Using 'unimaginably' can add emotional weight to a statement, making it more dramatic. After the reconciliation, they were unimaginably joyful.