| 1 | English | rack | A series of one or more shelves, stacked one... |
| 2 | Old English | reċċan | to stretch, extend; to stretch out, extend |
| 3 | Proto-West Germanic | rakkjan | to stretch, to straighten |
| 4 | Proto-Germanic | rakjaną | to stretch, to straighten |
| 5 | Proto-Indo-European | h₃roǵéyeti | to straighten, to make straight, to cause to be... |
| 6 | Proto-Indo-European | -éyeti | Forms causative imperfective verbs from roots;... |
| 7 | Proto-Indo-European | -yeti | Creates transitive imperfective verbs from roots |