To divide something larger into several smaller sections, groups, or categories. The verb is not separable.
example
Der Lehrer unterteilte die Klasse für die Gruppenarbeit in vier Teams.
The teacher subdivided the class into four teams for the group work.
Usage tips
Inseparable verb
'Unterteilen' (to subdivide) is an inseparable verb. The prefix 'unter-' always stays attached to the verb, even in main clauses and in the past participle. The past participle is 'hat unterteilt' (has subdivided).
EXAMPLE
Er unterteilte seinen Vortrag in drei Hauptpunkte.
He subdivided his presentation into three main points.
Sentence structure with 'in'
The structure for this verb is: etwas (accusative) in etwas (accusative) unterteilen. The preposition 'in' introduces the parts or categories that result from the subdivision.
EXAMPLE
Wir unterteilen den Garten in einen Gemüse- und einen Blumenbereich.
We are subdividing the garden into a vegetable area and a flower area.
Typical use
People often subdivide abstract or organizational things. Typical examples are: subdividing a text into sections, a book into chapters, or a project into tasks.
EXAMPLE
Die Autorin hat das Buch in zwölf kurze Kapitel unterteilt.
The author subdivided the book into twelve short chapters.
Compare with
near_synonym · confusable
unterteilen vs teilen
to share / divide
'teilen' and 'unterteilen' can both mean that something large becomes several smaller parts. 'teilen' is more general: you can divide a cake, divide a class, or divide a task into two parts. 'unterteilen' sounds more organized and precise. It is used especially when you structure something into sections, groups, or categories. Learners may confuse the words because both have to do with dividing. If it is only about separating something into pieces, 'teilen' often fits. If a clear structure is created, 'unterteilen' fits better.
unterteilen
Für den Kurs unterteilen wir das Thema in drei Kapitel.
For the course, we subdivide the topic into three chapters.