| keen | acer |
| keen scenter | odorus |
| keeness | acies |
| keep | teneo, servo, retineo, arx, obtineo, conservo |
| keep at work | exerceo |
| keep back | reservo |
| keep oneself from | parco |
| keep secret | dissimulo, celo |
| keep silent /convict | confuto |
| keep together | contineo |
| keep up | exsequor |
| keep warm | foveo |
| keeper | custos |
| keeper of a bathhouse | balneator |
| keeper of a tomb | tumbarius |
| kidnapper | plagiarius |
| kill | caedo, iuguolo |
| kiln | fornax |
| kin | semen.inis |
| kind | comis, lenis, genus, pius |
| kindle | inflammo, aduro (adustum) |
| kindly | benigne |
| kindness | benevolentia, humanitas |
| king | rex regis |
| kingdom | regnum |
| kiss | basium |
| kit | ornamentum |
| kneeling | supplex |
| knife blade | lamnia lammina lamna |
| knight | miles militis |
| knock /cause damage | infligo inflixi inflictum |
| knocked about | vapulus |
| knocking | offensio |
| know | teneo |
| knowing | gnarus |
| knowledge | gnaritas, conscientia, agnitio, scientia |