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Use "low-keyed" in a sentence
"They say he jumps the gun by announcing news flashes and providing tips and timely info to his favorite reporters -- in contrast to his low-keyed FBI associate, Jim Margolin, who is known for balance and accuracy."
"Sen. Hill-Bill would not be a low-keyed vice-pres. this is only Human nature."
"He's actually a hard-core Obama supporter, but likely purposely low-keyed it."