Final answer:
The word 'dynamic' in the sentence describes the lively and energetic nightlife of the city.
Step-by-step explanation:
The word 'dynamic' in the sentence 'As the city grew, it became known for its dynamic nightlife-there were always numerous things happening at all hours' is used as an adjective to describe the nightlife of the city.
'Dynamic' means lively or energetic, indicating that the nightlife was vibrant and there were always many activities taking place.
For example, there might have been clubs, concerts, and events happening throughout the night, making the city known for its exciting and constantly active nightlife.
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