"A recession of the panic, a deliquescence of her fear." p. 293, Cheyenne Amber
~ Catherine Anderson
I could take the word apart, but only get to a general gist, a lessening, but I couldn't latch onto a liquid aspect of that idea in connection with fear.
Merriam-Webster to the rescue: Medical Definition of DELIQUESCENT. : tending to melt or dissolve; especially : tending to undergo gradual dissolution and liquefaction by the attraction and absorption of moisture from the air.
Well, it is an adventure story, but a romance, as well. The hero's propinquity substitutes for the effect of the air, here.