The story
- Proto-Indo-European*h₃emh₃-
- Proto-Indo-European*h₃emh₃-lo-s
- Proto-Italic*amlos?
- Proto-Indo-European*h₂ent-
- Proto-Indo-European*h₂énts?
- Proto-Indo-European*h₂m̥bʰí
- Proto-Italic*amβi-
- Latinambi-
- Proto-Indo-European*pleh₁-
- Proto-Indo-European*pl̥h₁nós
- Proto-Italic*plēnos
- Latinplēnus?
- Latinambiplus?
- Latinamplus
- Proto-Indo-European*dʰeh₁-
- Proto-Italic*θakos
- Latinamplificāre
- Old Frenchamplifier
- Middle Englishamplifiyen
- English todayamplify
Inherited from Middle English amplifiyen, borrowed from Old French amplifier, borrowed from Latin amplificāre, from amplus (“abundant, ample”) + -ficō. By surface analysis, ample + -ify.
Etymology from Wiktionary, CC BY-SA 4.0.