debilis

• From dē- +‎ habilis. See the same contraction in dēbeō.
• Others suggest from dē- + Proto-Indo-European *bel- (“power, strength”). Compare Sanskrit बल (bala), Russian большой (bolʹšoj), Ancient Greek βελτίων (beltíōn, “better < stronger”).

• (Classical) IPA^(key): /ˈdeː.bi.lis/, [ˈd̪eːbɪlʲɪs̠]
• (Ecclesiastical) IPA^(key): /ˈde.bi.lis/, [ˈd̪ɛːbilis]

dēbilis (neuter dēbile, comparative dēbilior, superlative dēbilissimus); third-declension two-termination adjective

1. weak, frail, feeble

   Synonyms: languidus, fractus, aeger, mollis, fessus, tenuis, īnfirmus, inops, obnoxius

   Antonyms: praevalēns, fortis, potis, potēns, validus, strēnuus, compos

   • Cicero, Tusculanae Disputationes, Book II, Chapter IV

     Ita est utraque res sine altera debilis.

     Thus each is feeble without the other.

2. lame, disabled, crippled, infirm

   Synonym: claudus

Third-declension two-termination adjective.

• dēbilitās

• “debilis”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “debilis”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• debilis in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• debilis in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette