| A | B |
| idem, eadem, idem | the same |
| ignis, ignis, m. | fire |
| ille, illa, illud | that |
| immanis, immane | huge, monstrous |
| imperium, imperii, n. | command, power |
| imus, ima, imum | lowest |
| infelix, infelicis | unhappy, accursed |
| inferus, infera, inferum | low, below, underneath |
| ingens, ingentis | huge, mighty |
| inter | between, among |
| ipse, ipsa, ipsum | (him, her, it)self |
| ira, irae, f. | anger, wrath |
| is, ea, id | this; he, she, it |
| iam | now, already |
| iubeo, iubere, iussi, iussum | order, command |
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