Adverbial superlatives describe the highest degree of a property or an action. They are usually formed with am and a positive stem ending in sten, and are used as adverbs when they specify an activity, a behavior, or an intensity more closely. For classification as an adverb, a comparison with [Adverbs] and with the general [Gradation of Adverbs] helps.

The regular adverbial superlative is formed with am + positive stem + sten. The form remains unchanged and does not agree with gender, number, or case because it is used as an adverb. In contrast, the adjectival superlative shows inflection, for example in forms such as [Adjective Superlatives].

IdeeIdea.	BeispielExample.
Die regelmäßige Form entsteht mit am plus Positivstamm plus sten.The regular form is formed with am + positive stem + sten.	Er läuft am schnellsten.He runs the fastest.
Das Adverb bleibt unverändert und erhält keine Endung zur Anpassung.The adverb remains unchanged and does not receive any ending for agreement.	Sie spricht am deutlichsten.She speaks most clearly.
Der adverbiale Superlativ zeigt keine Deklination.The adverbial superlative shows no declension.	Er arbeitet am sorgfältigsten.He works most carefully.

The adverbial superlative usually comes after the verb or at the end of the sentence and describes the degree of an action there. If the sentence already contains an object or an additional element, the form often moves to the right edge of the sentence. In comparisons with a group, expressions such as am meisten von allen or unter allen am besten are particularly typical and belong to the same usage as [Comparative Adverbs].

IdeeIdea.	BeispielExample.
Die Form steht meist nach dem Verb.The form usually comes after the verb.	Er arbeitet am konzentriertesten.He works most attentively.
Die Form steht oft am Satzende.The form is often at the end of the sentence.	Sie singt heute am schönsten.She sings the most beautifully today.
Vergleichsausdrücke können die Gruppe ausdrücklich nennen.Comparison expressions can explicitly name the group.	Sie ist unter allen am zuverlässigsten.She is the most reliable of all.

Some very common adverbs form their superlative irregularly. Gern becomes am liebsten and viel becomes am meisten, with am meisten denoting the highest degree and not frequency. Therefore one should not confuse am meisten with meistens, because meistens describes regularity or frequency.

IdeeIdea.	BeispielExample.
Gern bildet den Superlativ unregelmäßig.Gern forms the superlative irregularly.	Ich helfe dir am liebsten.I would rather help you.
Viel bildet den Superlativ unregelmäßig.Viel forms the superlative irregularly.	Sie arbeitet am meisten.She works the most.
Meistens bezeichnet Häufigkeit, nicht Grad.Most of the time denotes frequency, not degree.	Er kommt meistens pünktlich.He usually arrives on time.

To achieve stronger emphasis, the form am allersten can be used. This intensification is mainly stylistically marked and sounds emphatic or colloquial, depending on the context. Some regional or informal variants diverge from it, while standard language prefers the clear form am plus superlative.

RegionRegion.	Wort oder WendungWord or expression.	Regionale DefinitionRegional Definition.	BeispielExample.
StandarddeutschStandard German.	am allerstenthe very first.	Diese Verstärkung hebt den höchsten Grad besonders stark hervor.This intensification highlights the highest degree particularly strongly.	Er kommt am allerfrühesten, wenn alle noch schlafen.He comes the very earliest, when everyone is still sleeping.
InformellInformal.	am allerbestenthe very best.	Diese Form wirkt stärker betont und stilistisch lebendig.This form appears more emphatic and stylistically lively.	Du machst das am allerbesten, wenn du ruhig bleibst.You do that best of all when you stay calm.
RegionalRegional.	alternative WendungenAlternative expressions.	Manche Dialekte verwenden andere Ausdrücke statt der Standardsuperlative.Some dialects use different expressions instead of the standard superlatives.	Hier klingt das in der Region oft anders, wenn man vergleicht.Here it often sounds different regionally when you compare.

The adjectival superlative denotes a noun and therefore agrees in form with that noun, while the adverbial superlative describes an action or a state more closely and remains unchanged. Therefore the adjectival schnellste differs clearly from am schnellsten, because only the latter form functions as an adverb. For contexts with degree expressions, [Degree Adverbs] is also helpful.

IdeeIdea.	BeispielExample.
Der adjektivische Superlativ bezieht sich auf ein Nomen.The adjectival superlative refers to a noun.	Der schnellste Läufer gewinnt.The fastest runner wins.
Der adverbiale Superlativ bezieht sich auf eine Handlung.The adverbial superlative refers to an action.	Er läuft am schnellsten.He runs the fastest.
Die beiden Formen erfüllen unterschiedliche grammatische Aufgaben.The two forms fulfill different grammatical functions.	Der schnellste Schüler arbeitet am schnellsten.The fastest student works the fastest.

With nicht so... wie expresses a lower degree, whereas am...sten marks the highest degree. The two structures therefore do not belong to the same level of comparison, but fulfill different functions in the sentence. Those who describe the gradation of features more precisely also benefit from [Gradation of Adverbs].

IdeeIdea.	BeispielExample.
Nicht so... wie drückt einen niedrigeren Grad aus.Not so... as expresses a lower degree.	Er läuft nicht so schnell wie ich.He doesn't run as fast as I do.
Am...sten drückt den höchsten Grad aus.Am...sten expresses the highest degree.	Er läuft am schnellsten von allen.He runs the fastest of all.
Beide Strukturen vergleichen auf unterschiedliche Weise.Both structures compare in different ways.	Sie arbeitet nicht so langsam wie früher, aber am gründlichsten.She does not work as slowly as before, but most thoroughly.

The adverbial superlative marks the highest degree of an action and, in German, is usually formed with am + positive stem + sten. It remains unchanged, often appears after the verb or at the end of the sentence, and clearly differs from the adjectival superlative. Irregular forms such as am liebsten and am meisten, as well as the intensifying form am allersten, expand the system, while confusion with meistens or with adjectival endings is avoided.