Infinitives ending in -it/a, -it/ä, e.g. tarvit/a ‘need’, are similar to huomat/a
verbs (§23.2), but their inflectional stem is formed differently:
Infinitive First person sing. Third person sing.
tarvit/a need tarvitse/n I need tarvitse/e he needs
ansait/a earn ansaitse/n ansaitse/e
hallit/a rule hallitse/n hallitse/e
harkit/a consider harkitse/n harkitse/e
häirit/ä disturb häiritse/n häiritse/e