Dismiss is a synonym of Drop. Drop is related to Wet. Sprinkle is a type of Wet. Sprinkle is a type of Rain. 
Appreciation would make you want to Thank. Acknowledge is a type of Thank. 
Dismiss <--Synonym--> Drop <--RelatedTo--> Wet <--IsA-- Sprinkle --IsA--> Rain 
Appreciation --CausesDesire--> Thank <--IsA-- Acknowledge 