| 1 | Ancient Greek | πίνη | pen shell; pearl shell, pearl |
| 2 | Ancient Greek | τηρέω | to watch over, take care of, guard; to have an... |
| 3 | Ancient Greek | -έω | Used to form verbs from nouns, adjectives and... |
| 4 | Proto-Indo-European | -éyeti | Forms causative imperfective verbs from roots;... |
| 5 | Proto-Indo-European | -yeti | Creates transitive imperfective verbs from roots |