| Language | Reflex(es) | Gloss | Grammar | Sources |
|---|
| English |
| Middle English | debylite | debility | n | CDC LRC |
| English | Bolshevik | 1917 Russian Revolutionary Communist | prop.n | LRC |
| English | debilitate | to weaken, enfeeble, impair strength | vb.trans | AHD W7 LRC |
| English | debility | weakness, infirmity | n | AHD W7 LRC |
| Italic |
| Latin | debilis | weak, lit. not strong | adj | W7 LRC |
| Latin | debilitas, debilitatis | debility | n.fem | W7 LRC |
| Latin | debilito, debilitāre, debilitātus | to debilitate | vb | W7 LRC |
| Portuguese | debilidade | debility | n | CDC LRC |
| Spanish | debilidad | debility | n | CDC LRC |
| Old French | debilite | debility | n | CDC LRC |
| Middle French | debilité | debility | n.fem | W7 LRC |
| Italian | debilità | debility | n | CDC LRC |
| Balto-Slavic |
| Old Church Slavonic | bol'ьi | more, bigger | adj.comp | LRC |
| Old Church Slavonic | bolьnъ | sick | adj | LRC |
| Old Church Slavonic | bolěznь | sickness | n.fem | LRC |
| Old Church Slavonic | bolěti, bolǫ, boliši | to be ill | vb | LRC |