The phrase “burgeoning hypothesis” refers to a new or rapidly developing idea or explanation that is gaining attention or interest but is still in its early stages of exploration or validation.

### Example in a sentence:

The burgeoning hypothesis that the cerebellum plays a role in emotion regulation is reshaping our understanding of neuropsychiatric disorders.

### Breakdown:

* Burgeoning = growing quickly, expanding * Hypothesis = a proposed explanation made on the basis of limited evidence, subject to further investigation

It’s often used in academic or scientific contexts to signal that a concept is emerging and gathering preliminary support, but has not yet been fully tested or widely accepted.