Adverbs of Manner in Finnish

Overview

Adverbs of manner describe how an action is performed — quickly, slowly, well, badly, carefully, and so on. At the B1 level, learning to form and use manner adverbs significantly enriches your Finnish expression. While Finnish does not have a single universal suffix for creating adverbs (like English "-ly"), there are several productive patterns that allow you to derive manner adverbs from adjectives.

The most common way to form manner adverbs in Finnish is by adding -sti to the adjective stem, but other patterns exist as well, including the instructive case form and various fixed adverbs. Understanding these patterns gives you the tools to describe actions with precision and nuance.

Manner adverbs are essential for everyday communication — they appear in descriptions, evaluations, instructions, and narratives. Mastering them helps you move beyond basic sentence structures toward more expressive and natural Finnish.

How It Works

Formation with -sti

The most productive adverb suffix is -sti, added to the adjective's strong stem:

Adjective	Adverb	English
nopea (fast)	nopeasti	quickly
hidas (slow)	hitaasti	slowly
hyvä (good)	hyvin	well (irregular)
huono (bad)	huonosti	badly
kaunis (beautiful)	kauniisti	beautifully
selkeä (clear)	selkeästi	clearly
hiljainen (quiet)	hiljaa	quietly (irregular)
helppo (easy)	helposti	easily
vaikea (difficult)	vaikeasti	with difficulty

Common irregular manner adverbs

Adverb	English
hyvin	well
huonosti	badly
hiljaa	quietly
kovaa	loudly / hard
nopeasti	quickly
hitaasti	slowly
tarkkaan	carefully / precisely
paljon	a lot
vähän	a little

Other formation patterns

Pattern	Example	English
Adessive (-lla/-llä)	hiljaisella äänellä	in a quiet voice
Instructive (-n)	juosten	running (by running)
Fixed forms	mielellään	gladly
Fixed forms	iloisesti	happily

Comparison of manner adverbs

Positive	Comparative	Superlative
nopeasti	nopeammin	nopeimmin
hitaasti	hitaammin	hitaimmin
hyvin	paremin	parhaiten
huonosti	huonommin	huonoiten

Examples in Context

Finnish	English	Note
Hän puhuu nopeasti.	He/She speaks quickly.	-sti adverb
Kävele hitaasti!	Walk slowly!	-sti adverb
Puhutko suomea hyvin?	Do you speak Finnish well?	Irregular (hyvin)
Hän laulaa kauniisti.	He/She sings beautifully.	-sti adverb
Kuuntele tarkkaan!	Listen carefully!	Fixed form
Puhu hiljaa, lapsi nukkuu.	Speak quietly, the child is sleeping.	Irregular (hiljaa)
Hän oppi helposti.	He/She learned easily.	-sti adverb
Teen sen mielellään.	I'll do it gladly.	Fixed expression
Hän selitti asian selkeästi.	He/She explained the matter clearly.	-sti adverb
Juoksen nopeammin kuin sinä.	I run faster than you.	Comparative adverb
Hän työskentelee ahkerasti.	He/She works diligently.	-sti adverb
Vastasin väärin.	I answered incorrectly.	Fixed form

Common Mistakes

Using the adjective instead of the adverb

• Wrong: Hän puhuu nopea. (adjective form)
• Right: Hän puhuu nopeasti. (adverb form)
• Why: When modifying a verb (describing how an action is done), you need the adverb form, not the adjective.

Using -sti with irregular adverbs

• Wrong: hyvästä (trying to derive from hyvä)
• Right: hyvin
• Why: Some common adverbs are irregular and must be memorized: hyvin (well), hiljaa (quietly), kovaa (loudly).

Wrong comparative form

• Wrong: nopeampiasti (adding -sti to the comparative adjective)
• Right: nopeammin
• Why: Adverb comparatives use -mmin, not comparative adjective + -sti.

Usage Notes

In spoken Finnish, manner adverbs are sometimes replaced by adjective forms in casual contexts. You might hear Hän puhuu hyvää suomea (using the adjective to describe the quality of Finnish spoken) alongside the adverb form. However, for clear, standard Finnish, using the proper adverb form is important.

The comparative and superlative forms of adverbs use -mmin and -mmin (or irregular forms), which differ from the adjective comparison suffixes (-mpi, -in).

Practice Tips

1. Adjective-to-adverb conversion: Take 10 adjectives you know and form their -sti adverbs. Then use each in a sentence describing how someone does something.
2. Action descriptions: Describe how people around you do things: Hän syö nopeasti. Lapsi piirtää kauniisti. Koira juoksee kovaa.
3. Comparative practice: Compare how two people do the same thing: Minä puhun hitaammin kuin hän. Hän kirjoittaa kauniimmin kuin minä.

Related Concepts

• Prerequisite: Adjective Agreement — adjectives are the basis for most manner adverbs