| 1 | English | imperfect | not perfect; unisexual: having either male or... |
| 2 | Middle English | imperfit | — |
| 3 | Old French | imparfit | — |
| 4 | Latin | imperfectus | unfinished, incomplete; imperfect |
| 5 | Latin | perfectus | achieved, executed, carried out, finished,... |
| 6 | Latin | perficiō | — |
| 7 | Latin | faciō | — |
| 8 | Latin | -torium | nominative neuter singular of -tōrius; accusative... |
| 9 | Latin | -tōrius | — |
| 10 | Latin | -tor | -er |
| 11 | Proto-Italic | -tōr | — |
| 12 | Proto-Indo-European | -tōr | Derives agent nouns from verbs, denoting someone... |
| 13 | Proto-Indo-European | -tor-s | — |