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amplify (v.)
early 15c., "to enlarge, expand, increase," from Old French amplifier (15c.), from Latin amplificare "to enlarge," from amplus "large" (see ample) + combining form of facere "to make, do" (from PIE root *dhe- "to set, put"). Meaning "augment in volume or amount" is from 1570s. Restriction of use to sound seems to have emerged from c. 1915 in reference to radio technology.
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Definitions of amplify from WordNet
Dictionary entries near amplify
amphora
amphoteric
ample
amplification
amplifier
amplify
amplitude
amply
ampoule
ampul
ampulla