amplus

Latin

Disputed.

Perhaps from Proto-Italic *amlos (“seizable”), from Proto-Indo-European *h₃emh₃-lo-s, from *h₃emh₃- (“to grab”), with etymological meaning "graspable". Related to ampla (“handle, grip”).
Otherwise for ambiplus (“full on both sides”), composed of ambi- (“both”) and an element akin to plēnus (“full”) (and more distantly to plūs (“more”)).

amplus (feminine ampla, neuter amplum, comparative amplior, superlative amplissimus, adverb amplē or ampliter); first/second-declension adjective

Case / Gender	Masculine	Feminine	Neuter	Masculine	Feminine	Neuter
Number	Singular			Plural
Nominative	amplus	ampla	amplum	amplī	amplae	ampla
Genitive	amplī	amplae	amplī	amplōrum	amplārum	amplōrum
Dative	amplō	amplae	amplō	amplīs
Accusative	amplum	amplam	amplum	amplōs	amplās	ampla
Ablative	amplō	amplā	amplō	amplīs
Vocative	ample	ampla	amplum	amplī	amplae	ampla

Pokorny, Julius (1959) Indogermanisches etymologisches Wörterbuch [Indo-European Etymological Dictionary] (in German), Bern, München: Francke Verlag
Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN
Walther von Wartburg (1928–2002) “amplus”, in Französisches Etymologisches Wörterbuch (in German), volumes 24: Refonte A–Aorte, page 488

^ De Vaan, Michiel (2008) “amplus”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 40