| infectieux | infectious |
| infection | infection |
| Infection alimentaire | Food-born infection |
| Infection nosocomiale | Hospital-acquired infection |
| Infection sexuellement transmissible | Sexually transmitted disease |
| Infection virale | Virus attack |
| Inference bayesienne | Bayesian probability |
| infernal | diabolical |
| Infernale | Plot of the Rue Saint-Nicaise |
| Inferno Metal Festival | Inferno Metal Festival |
| infertile | barren |
| infertilité | infertility |
| infestation | infestation |
| infestation des aliments | infestation of food |
| infestation des cultures | infestation of crops |
| infestation parasitaire | pest infestation |
| infester | infest |
| Infibulation | Infibulation |
| Infibuler | Infibulate |
| infidèle | disloyal |
| infidélité | fraudulence |
| infiltration | infiltration |
| infime | insignificant |
| Infineon Technologies | Infineon Technologies |
| Infineon Technologies AG | Infineon Technologies |
| infini | endless |
| infiniment | immensely |
| Infinite Crisis | Infinite Crisis |
| Infinite Ryvius | Infinite Ryvius |
| infinitif | infinitive |
| infinitif avec to | to-infinitive |
| infinitif complet | to-infinitive |
| Infinity Broadcasting Corporation | CBS Radio |
| Infinity Engine | Infinity Engine |
| Infinity On High | Infinity on High |
| infinité | infinity |
| infinitésimal | infinitesimal |
| infirmation | nullification |
| infirme | disabled |
| infirmer | preempt |
| infirmerie | sickbay |
| infirmes | disabled |
| infirmier | nurse |
