lead up to
Intermédiaire (B1) neutral
Be the events or actions that happen before something important, or slowly get to a difficult topic.
"Tensions had been rising in the months leading up to the outbreak of the conflict."
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How Japan is Preparing for War With China
RealLifeLore · 47:02
give to someone else in the lead up to
Places you will never see 
Geography Now · 0:52
There are no roads that lead up to it
What leverage Iran may have as U.S. war continues
Washington Week PBS · 10:00
quite a bit in the lead up to this conflict.
Trief Interview / The Honorable DJ Metal Monkey Radio Show
DJ Metal Monkey Radio Show · 44:47
And that's this This lead up to why I[ __] with your
Unexpected Strawberry Recipes | Anthony Bourdain's The Mind of a Chef | Full Episode
PBS Food · 21:56
They lead up to a peak, and then there's a slow waning.