| Sg | Pl | |
| 1st | gnaga (rule) | gnögum (rule) |
| 2nd | gnagar (rule) | gnagið (rule) |
| 3rd | gnagar (rule) | gnaga (rule) |
| Sg | Pl | |
| 1st | gnagaða (rule) | gnöguðum (rule) |
| 2nd | gnagaðir (rule) | gnöguðuð (rule) |
| 3rd | gnagaði (rule) | gnöguðu (rule) |
| Sg | Pl | |
| 1st | gnagumk (rule) | gnagumk (rule) |
| 2nd | gnagask (rule) | gnagizk (rule) |
| 3rd | gnagask (rule) | gnagask (rule) |
| Sg | Pl | |
| 1st | gnagaðumk (rule) | gnöguðumsk (rule) |
| 2nd | gnagaðisk (rule) | gnöguðuzk (rule) |
| 3rd | gnagaðisk (rule) | gnöguðusk (rule) |
| Sg | Pl | |
| 1 | gnaga (rule) | gnagim (rule) |
| 2 | gnagir (rule) | gnagið (rule) |
| 3 | gnagi (rule) | gnagi (rule) |
| Sg | Pl | |
| 1 | gnagaða (rule) | gnagaðim (rule) |
| 2 | gnagaðir (rule) | gnagaðið (rule) |
| 3 | gnagaði (rule) | gnagaði (rule) |
| Form | |
| Participle | gnagandi (rule) |
| Past participle | gnagaðr (rule) |
| Middle infinitive | gnagask (rule) |
| Sg | |
| 2nd | gnaga (rule) |