| Sg | Pl | |
| 1st | ? (rule) | kaupum (rule) |
| 2nd | ?r (rule) | kaupið (rule) |
| 3rd | ?r (rule) | kaupa (rule) |
| Sg | Pl | |
| 1st | ?a (rule) | ?um (rule) |
| 2nd | ?ir (rule) | ?uð (rule) |
| 3rd | keypti (rule) | ?u (rule) |
| Sg | Pl | |
| 1st | kaupumk (rule) | kaupumk (rule) |
| 2nd | ?sk (rule) | kaupizk (rule) |
| 3rd | ?sk (rule) | kaupask (rule) |
| Sg | Pl | |
| 1st | ?umk (rule) | ?umsk (rule) |
| 2nd | ?isk (rule) | ?uzk (rule) |
| 3rd | keyptisk (rule) | ?usk (rule) |
| Sg | Pl | |
| 1 | kaupa (rule) | kaupim (rule) |
| 2 | kaupir (rule) | kaupið (rule) |
| 3 | kaupi (rule) | kaupi (rule) |
| Sg | Pl | |
| 1 | ?a (rule) | ?im (rule) |
| 2 | ?ir (rule) | ?ið (rule) |
| 3 | ?i (rule) | ?i (rule) |
| Form | |
| Participle | kaupandi (rule) |
| Past participle | ?r (rule) |
| Middle infinitive | kaupask (rule) |
| Sg | |
| 2nd | kaup (rule) |