| 1 | Latin | indigens | needing, wanting, requiring, desiring, lacking |
| 2 | Latin | indigere | present active infinitive of indigeō; to need |
| 3 | Latin | indigeo | I need, want, require, lack; I long for, desire |
| 4 | Latin | indu- | within, in; inside |
| 5 | Latin | indu | Archaic form of in; in, within |
| 6 | Old Latin | endo | in |
| 7 | Proto-Indo-European | h₁n̥dó | into, inside |
| 8 | Proto-Indo-European | h₁én | in |