| infallibility | infaillibilité |
| infallible | infaillible |
| infamous | infâme |
| infamy | bassesse |
| infancy | première enfance |
| infant | bébé |
| Infant Jesus of Prague | Enfant Jésus de Prague |
| infant mortality | mortalité infantile |
| Infanta | Infante |
| Infanta Catarina of Portugal | Catherine de Bragance |
| Infanta Eulalia of Spain | Eulalie de Bourbon |
| Infanta Isabel of Portugal | Isabelle de Portugal |
| Infanta Leonor of Spain | Leonor de Borbón |
| Infanta Maria Antonia of Portugal | Antonia de Bragance |
| Infanta Maria of Guimarães | Marie du Portugal |
| Infanta Maria of Portugal | Marie de Portugal |
| Infanta Marie Anne of Portugal | Marie-Anne de Portugal |
| Infanta Sofía of Spain | Sofía de Borbón |
| Infante Gonzalo of Spain | Gonzalve de Bourbon |
| Infante João of Portugal | Jean de Portugal |
| infanticide | infanticide |
| infantile | infantile |
| infantile paralysis | paralysie infantile |
| infantry | infanterie |
| Infantry square | Carré |
| infantryman | soldat d'infanterie |
| infarct | infarctus |
| infarction | infarctus |
| infatuated with | infatué de |
| infatuation | engouement |
| infect | infecter |
| infect with | transmettre à |
| infection | infection |
| infectious | infectieux |
| Infectious bursal disease | Maladie de Gumboro |
| infectious disease | maladie infectieuse |
| infer | déduire |
| inference | déduction |
| inferior | pauvre |
| Inferior and superior planets | Planète supérieure |
| Inferior mesenteric vein | Veine mésentérique inférieure |
| Inferior nasal conchae | Cornet nasal |
| inferiority | infériorité |
| inferiority complex | complexe d'infériorité |
| infernal | infernal |
