| gaudium, gaudii or gaudi | (noun, n.) | joy |
| genus, generis | (noun, n.) | kind |
| gero, gerere, gessi, gestus | (verb) | carry on, wage |
| gladiator, gladiatoris | (noun, m.) | gladiator |
| gladius, gladii or gladi | (noun, m.) | sword |
| gloria, gloriae | (noun, f.) | glory |
| gratus, grata, gratum | (adjective) | pleasing |
| gravis, grave | (adjective) | heavy, severe, serious |
| habeo, habere, habui, habitus | (verb) | have, hold |
| habito, habitare, habitavi, habitatus | (verb) | dwell, live |
| haesito, haesitare, haesitavi, haesitatus | (verb) | hesitate, be at a loss |
| hebdomas, hebdomadis | (noun, f.) | week |
| hesternus, hesterna, hesternum | (adjective) | yesterday |
| hic, haec, hoc | (adjective) | this |
| hic, haec, hoc | (pronoun) | he, she, it |
| hiems, hiemis | (noun, f.) | winter |
| homo, hominis | (noun, m.) | man |
| honestus, honesta, honestum | (adjective) | honored, respected |
| hora, horae | (noun, f.) | hour |
| hortor, hortari, hortatus | (verb) | urge, encourage |
| hortus, horti | (noun, m.) | garden |
| hostis, hostis | (noun, m.) in the singular, an individual enemy in war; in the plural, a collective noun, "the enemy" | enemy |
| humilis, humile | (adjective) | low, shallow; humble; mean, base |
| iacio, iacere, ieci, iactus | (verb) | throw |
| idem, eadem, idem | (adjective) | the same |
| idem, eadem, idem | (pronoun) | he, she, it |
| idoneus, ideonea, idoneum | (adjective) | fit, suitable |
| ignavia, ignaviae | (noun f.) | laziness, cowardice |
| ignis, ignis | (noun, m.) | fire |
| ille, illa, illud | (adjective) | that |
| ille, illa, illud | (pronoun) | he, she, it |
| immortalis, immortale | (adjective) | immortal |
| impedimentum, impedimenti | (noun, n.) | hindrance |
| impedio, impedire, impedivi, impeditus | (verb) | hinder |
| imperator, imperatoris | (noun, m.) | general, commander, emperor |
| imperium, imperii or imperi | (noun n.) | command |
| impero, imperare, imperavi, imperatus | (verb) | command, order |
| impetus, impetus | (noun, m.) | attack |
| in libertatem vindicare | (verb) | set free |
| in matrimonium ducere | (verb) | marry |
| incendo, incendere, incendi, incensus | (verb) | set fire to, burn |
| incito, incitare, incitavi, incitatus | (verb) | arouse, stir up, incite |
| incola, incolae | (noun, f. or m.) | inhabitant |
| incolo, incolere, incolui | (verb) | live in, reside |
| indicium, indicii or indici | (noun n.) | information, disclosure, token, evidence (before a court) |
| infernus, inferna, infernum | (adjective) | lower |
| infestus, infesta, infestum | (adjective) | threatening, dangerous, hostile |
| inimicus, inimica, inimicum | (adjective) | unfriendly |
| inimicus, inimici | (noun, m.) | (personal) enemy |
| initium, initii or initi | (noun, n.) | beginning, start |
| iniuria, iniuriae | (noun, f.) | wrong, injury; abuse, insult, offense; sexual assault |
| inopia, inopiae | (noun, f.) | want, scarcity |
| instruo, instruere, instruxi, instructus | (verb) | draw up, form, train |
| insula, insulae | (noun, f.) | island |
| intercludo, intercludere, interclusi, interclusus | (verb) | shut off, stop |
| interficio, interficere, interfeci, interfectus | (verb) | kill |
| inutilis, inutile | (adjective) | useless, harmful |
| invenio, invenire, inveni, inventus | (verb) | find, come upon |
| ipse, ipsa, ipsum | (adjective) | himself, herself, itself, very |
| ipse, ipsa, ipsum | (pronoun) | he (himself), she (herself), it (itself) |
| iste, ista, istud | (pronoun & adjective) conjugated like ille, illa, illud | that, that one of yours generally negative connotations |
| iter, iterinis | (noun, n.) | journey, march, way, route |
| iubeo, iubere, iussi, iussus | (verb) | order, command |
| iudicium, iudicii or iudici | (noun, n.) | judgment, sentence |
| iudico, iudicare, iudicavi, iudicatus | (verb) | judge, sentence, examine |
| iureiuro, iureiurare, iureiuravi, iureiuratus | (verb) | swear by an oath |
| ius, iuris | (noun, n.) | right, authority |
| iuvo, iuvare, iuvi, iutus | (verb) | help, aid |