Instructive—niin, so; kuin, how; tosin, truly; harvoin, rarely; kaksittain, two at a time.
The second infinitive is also used adverbially in the instructive, nimittäin (for en), that is to say.
Adverbs are also found in the comparative and superlative degree, and are then in the essive, partitive, and translative cases, or adessive, ablative, and allative. The termination ksi of the translative often sinks to s, or merely the aspirate. Likempänä, nearer; likempää, likemmäksi (-mmäs or -mmaʻ), likemmällä, likemmältä, etc.
The adverbial suffixes are added to the end of other words. The principal are—
Ko, kö, which gives an interrogative meaning to the word to which it is affixed, like ли in Russian.
Han, hän, pa, pä, have a strengthening or affirmative force.
Ki, kin, have a copulative sense,—minäkin, I too.