Active Voice
Indicative Present
| 1st sing. | grimmō |
| 2nd sing. | grimmizi |
| 3rd sing. | grimmidi |
| 1st dual | grimmōz |
| 2nd dual | grimmadiz |
| 1st plur. | grimmamaz |
| 2nd plur. | grimmid |
| 3rd plur. | grimmandi |
Indicative Past
| 1st sing. | gramm |
| 2nd sing. | grammt |
| 3rd sing. | gramm |
| 1st dual | grummū |
| 2nd dual | grummudiz |
| 1st plur. | grummum |
| 2nd plur. | grummud |
| 3rd plur. | grummun |
Subjunctive Present
| 1st sing. | grimmaų |
| 2nd sing. | grimmaiz |
| 3rd sing. | grimmai |
| 1st dual | grimmaiw |
| 2nd dual | grimmaidiz |
| 1st plur. | grimmaim |
| 2nd plur. | grimmaid |
| 3rd plur. | grimmain |
Subjunctive Past
| 1st sing. | grummį̄ |
| 2nd sing. | grummīz |
| 3rd sing. | grummī |
| 1st dual | grummīw |
| 2nd dual | grummīdiz |
| 1st plur. | grummīm |
| 2nd plur. | grummīd |
| 3rd plur. | grummīn |
Imperative
| 2nd sing. | grimm |
| 3rd sing. | grimmadau |
| 2nd dual | grimmadiz |
| 2nd plur. | grimmid |
| 3rd plur. | grimmandau |
Passive Voice
Indicative
| 1st sing. | grimmai |
| 2nd sing. | grimmazai |
| 3rd sing. | grimmadai |
| 1st plur. | grimmandai |
| 2nd plur. | grimmandai |
| 3rd plur. | grimmandai |
Subjunctive
| 2nd sing. | grimmaizau |
| 3rd sing. | grimmaidau |
| 1st plur. | grimmaindau |
| 2nd plur. | grimmaindau |
| 3rd plur. | grimmaindau |
Participles
| Present | grimmandz |
| Past | grummanaz |
Etymology
From Pre-Germanic *gʰrémne- or *gʰrénme-, from Proto-Indo-European *gʰrem- (“to be angry”), likely from Proto-Indo-European *gʰer- (“to make a noise, rattle, growl, murmur”).
Verbs referencing "grimmaną"
Dutch
grimmen, Proto-Slavic
grьměti.
Cognates
-