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v. Simple past tense and past participle of decouple.

"It was not at all obvious that we were in an deflationary spiral until the effective funds became decoupled from the target rate, and that was not until late October when the spread became greater than 75 basis points – and stayed there until the fed just went ahead and dropped the target to zero, which was the end of possible action on the monetary policy front."

decoupled    decouples    decoupling   

severalise    separate    secern    secernate    severalize   

couple    quintuple    supple    uncouple