Imminent comes from minent, from Old French imminent, from Latin imminēns, imminent-, present participle of imminēre, to overhang : in-, in; see IN-² + -minēre, to jut, threaten. 

Don't confuse "eminent" and "imminent".  They are both adjectives, but they describe different things.  "Eminent" refers to comeone or something that is famous, respected, and outstanding, often within a specific field.  "imminent" describes something that is about to happen, likely in the near future.  

The adjective "imminent" was first used in English in the early 1500s.  The Oxford English Dictionary records its earliest use in 1528 in the writing of Stephen Gardiner, theologian, administrator, and bishop of Winchester.  It is a borrowing from the French "imminent" (14th century), which itself comes from the Latin "imminens".  

Examples of "imminent" used in a sentence: 
"The principal's arrival at the meeting is imminent." 
"These patients are facing imminent death." 
"We are awaiting their imminent arrival." 
"The hurricane's arrival on shore is imminent." 
"This isn’t the first time a world leader constructed a wall between himself and those he deemed imminent threats." 
"It emphasised that there was'absolutely no information or intelligence' suggesting an imminent threat." 
"After five days in the hideout, the rebels told them a new attack was imminent."

The Secret Author Short Story contests is imminent.  

More story prompts on Gay Authors is also imminent.  

2 hours ago, Bill W said:

The Oxford English Dictionary records its earliest use in 1528 in the writing of Stephen Gardiner, theologian, administrator, and bishop of Winchester.  

I love that the OED needed to indicate that Gardiner was both a theologian and a Bishop. I would have thought that one of the requirements for being as eminent as a Bishop is being a theologian. Apparently the OED knows that there are Bishops who lack theology. I await the imminent lightning bolt striking me down.