U

amplify

verb (used with object), am·pli·fied, am·pli·fy·ing.

to make larger, greater, or stronger; enlarge; extend.
to expand in stating or describing, as by details or illustrations; clarify by expanding.
Electricity. to increase the amplitude of; cause amplification in.
Archaic. to exaggerate.

verb (used without object), am·pli·fied, am·pli·fy·ing.

to discourse at length; expatiate or expand one’s remarks, speech, etc. (usually followed by on): The preacher amplified on the theme of brotherly love.

verb -fies, -fying or -fied

(tr) to increase in size, extent, effect, etc, as by the addition of extra material; augment; enlarge; expand
electronics to produce amplification of (electrical signals); increase the amplitude of (signals)
(tr) US to exaggerate
(intr) to expand or enlarge a speech, narrative, etc

early 15c., “to enlarge or expand,” from Middle French amplifier, from Latin amplificare “to enlarge,” from amplificus “splendid,” from amplus “large” (see ample) + the root of facere “make, do” (see factitious). Meaning “augment in volume or amount” is from 1570s. Restriction of use to sound seems to have emerged in the electronic age, c.1915, in reference to radio technology.