If you have a two-syllable Finnish verb ending in -da/-dä and you replace that with -mari/-märi, you sometimes get a noun which may or may not mean 'person who performs the action described by the verb':
| verb | noun | meaning of verb | meaning of noun | meaning = 'doer of X'? |
|---|---|---|---|---|
| juoda | juomari | drink | drinker | ✔️ Yes |
| jäädä | jäämäri | stay | does not exist | ➖ N/A |
| käydä | käymäri | go, visit | does not exist | ➖ N/A |
| luoda | luomari | create | does not exist | ➖ N/A |
| lyödä | lyömäri | hit, strike | beating instrument | ⭕ Yes, but not a person |
| myydä | myymäri | sell | does not exist | ➖ N/A |
| naida | naimari | marry; fuck | does not exist | ➖ N/A |
| nähdä | nähmäri | see | does not exist | ➖ N/A |
| puida | puimari | thresh | does not exist | ➖ N/A |
| saada | saamari | get, obtain | dang, darn (mild curse, not a noun) | ❌ No |
| soida | soimari | sound, ring | does not exist | ➖ N/A |
| suoda | suomari | allow, grant | does not exist | ➖ N/A |
| syödä | syömäri | eat | glutton, excessive eater | ✔️ Yes |
| tehdä | tehmäri | do, make | does not exist | ➖ N/A |
| tuoda | tuomari | bring | judge, referee, umpire | ❌ No |
| uida | uimari | swim | swimmer | ✔️ Yes |
| viedä | viemäri | take (to another place) | sewer /ˈs(j)uːə(ɹ)/ | ⭕ Yes, but not a person |
| voida | voimari | can, be able to; feel, do | does not exist | ➖ N/A |