| Sg | Pl | |
| 1st | ? (rule) | gróm (rule) |
| 2nd | ?r (rule) | gróið (rule) |
| 3rd | grœr (rule) | gróa (rule) |
| Sg | Pl | |
| 1st | ?a (rule) | ?um (rule) |
| 2nd | ?ir (rule) | ?uð (rule) |
| 3rd | ?i (rule) | ?u (rule) |
| Sg | Pl | |
| 1st | gróumk (rule) | gróumk (rule) |
| 2nd | ?sk (rule) | gróizk (rule) |
| 3rd | grœsk (rule) | gróask (rule) |
| Sg | Pl | |
| 1st | ?umk (rule) | ?umsk (rule) |
| 2nd | ?isk (rule) | ?uzk (rule) |
| 3rd | ?isk (rule) | ?usk (rule) |
| Sg | Pl | |
| 1 | gróa (rule) | gróim (rule) |
| 2 | gróir (rule) | gróið (rule) |
| 3 | grói (rule) | grói (rule) |
| Sg | Pl | |
| 1 | ?a (rule) | ?im (rule) |
| 2 | ?ir (rule) | ?ið (rule) |
| 3 | ?i (rule) | ?i (rule) |
| Form | |
| Participle | gróandi (rule) |
| Past participle | ?r (rule) |
| Middle infinitive | gróask (rule) |
| Sg | |
| 2nd | gró (rule) |