| 1 | Middle English | fraudulent | Dishonest, fraudulent; based on fraud; Necrotic,... |
| 2 | Middle French | fraudulent | — |
| 3 | Latin | fraudulentus | deceitful, fraudulent; dishonest, false |
| 4 | Latin | -ulentus | adjective-forming suffix meaning abounding in,... |
| 5 | Latin | -entus | adjective-forming suffix meaning abounding in,... |
| 6 | Latin | cruentus | bloody in its various senses, "particularly:" |
| 7 | Latin | cruor | blood, gore; murder, bloodshed |
| 8 | Proto-Indo-European | krewh₂- | blood outside the body |