lend force to

See: compound
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References in classic literature ?
Winkle; bowing his head, courteously, in the emphasis of his discourse, gently waving his left hand to lend force to his observations, and all glowing with placid smiles.
Failure-to-warn actions, in particular, lend force to the FDCA's premise that manufacturers, not the FDA, bear primary responsibility for their drug labeling at all times.