So far the rules have been clean: real-word prefixes (auf-, an-, mit-) split and are stressed; the eight bound prefixes (be-, ver-, zer-…) never split and are unstressed. The prefixes on this page sit on the fence. durch-, über-, um-, unter-, wieder- (and the rarer hinter-) can be either separable or inseparable — and which one you choose changes the meaning of the verb. Sometimes you are dealing with two genuinely different verbs that happen to share a spelling. The good news: a single test resolves it every time, and you already know it — stress.
Stress is the master key
The rule is wonderfully consistent:
- Stressed prefix → separable → usually the literal, physical meaning.
- Stressed stem → inseparable → usually the figurative, abstract meaning.
When you say one of these verbs aloud, you are already choosing its meaning. Saying it the wrong way doesn't just sound off — it can produce a completely different sentence.
The classic minimal pairs
umfahren — to run over vs. to drive around
The textbook showcase, because the two meanings are almost opposites.
Pass auf, du fährst das Schild um!
Watch out, you're going to knock the sign over! (UMfahren, separable, literal — driving into and over it)
Der Bus umfährt die Baustelle.
The bus drives around the construction site. (umFAHREN, inseparable, figurative — going around it)
So Er fährt das Schild um topples the sign; Er umfährt das Schild avoids it. One letter of stress decides whether the sign is destroyed or spared.
übersetzen — to ferry across vs. to translate
Der Fährmann setzt uns ans andere Ufer über.
The ferryman takes us across to the other bank. (ÜBERsetzen, separable, literal)
Sie übersetzt den Roman ins Deutsche.
She is translating the novel into German. (überSETZen, inseparable, figurative)
durchschauen — to look through vs. to see through someone
Ich schaue die Unterlagen noch einmal durch.
I'll look through the documents once more. (DURCHschauen, separable, literal — scanning them)
Ich durchschaue deinen Plan.
I see through your scheme. (durchSCHAUen, inseparable, figurative — I'm not fooled)
unterstellen — to put under shelter vs. to insinuate
Wir stellen die Fahrräder unter, bevor es regnet.
We'll put the bikes under cover before it rains. (UNTERstellen, separable, literal)
Du unterstellst mir böse Absichten.
You're accusing me of bad intentions. (unterSTELLen, inseparable, figurative)
wiederholen — to fetch back vs. to repeat
Hol bitte den Ball wieder.
Please fetch the ball back. (WIEDERholen, separable, literal — get it again)
Können Sie das bitte wiederholen?
Could you please repeat that? (wiederHOLen, inseparable, figurative)
A useful spelling note: when wieder- means a concrete "back / again" and separates, German often writes it as a free adverb (wieder sehen, wieder holen). The inseparable, idiomatic verbs are solid: wiederholen (repeat), wiederholen in the participle wiederholt.
How they form participles — the two systems collide
Because separable and inseparable verbs build participles differently, each member of a pair takes a different participle. This is where the stress test pays off twice.
| Verb (stress) | Type | Participle | Meaning |
|---|---|---|---|
| ÜBERsetzen | separable | übergesetzt | ferried across |
| überSETZen | inseparable | übersetzt | translated |
| UMfahren | separable | umgefahren | knocked over (with a vehicle) |
| umFAHREN | inseparable | umfahren | driven around |
| DURCHschauen | separable | durchgeschaut | looked through |
| durchSCHAUen | inseparable | durchschaut | seen through |
The separable forms insert -ge- between the prefix and the stem (übergesetzt), exactly as you'd expect from a separable verb. The inseparable forms take no ge- at all (übersetzt), like any be-/ver- verb. So Er hat uns übergesetzt = he ferried us across; Er hat den Text übersetzt = he translated the text.
Der Fährmann hat uns sicher übergesetzt.
The ferryman ferried us across safely. (separable participle with -ge-)
Sie hat das Gedicht wunderbar übersetzt.
She translated the poem wonderfully. (inseparable participle, no ge-)
Word order in the present tense
The behaviour in a live sentence follows directly. The separable member splits and sends its prefix to the end; the inseparable member stays solid.
Ich schaue die Liste kurz durch.
I'll glance through the list. (separable — durch goes to the end)
Sie durchschauen jede Ausrede.
They see through every excuse. (inseparable — stays whole)
English contrast: one spelling, two verbs
English speakers consistently miss this because English uses separate words to keep these meanings apart — "drive around" versus "run over" are obviously different. German hides the difference inside one written verb and exposes it only through stress and separability. A learner who reads umfahren on the page has no way to know which verb it is without context; a learner who hears it knows instantly. This is why reading these verbs silently is dangerous and saying them aloud is the cure. Treat each pair as two verbs, not one verb with two senses.
Common Mistakes
❌ Der Bus fährt die Baustelle um.
Incorrect for 'drives around the site' — separable UMfahren means 'knock over', so this says the bus knocks the site over.
✅ Der Bus umfährt die Baustelle.
Correct — inseparable umFAHREN gives the intended 'drives around'.
❌ Sie setzt den Roman ins Deutsche über.
Incorrect — the separable ÜBERsetzen means 'ferry across', not 'translate'.
✅ Sie übersetzt den Roman ins Deutsche.
Correct — inseparable überSETZen is the verb for 'translate'.
❌ Sie hat das Buch übergesetzt.
Incorrect for 'she translated the book' — the -ge- participle belongs to the separable 'ferry across' verb.
✅ Sie hat das Buch übersetzt.
Correct — the inseparable 'translate' verb takes no ge-.
❌ Können Sie das bitte wiederholen — holen Sie es wieder?
Incorrect — conflating the two verbs; the inseparable wiederHOLen ('repeat') does not split.
✅ Können Sie das bitte wiederholen?
Correct — 'repeat' is inseparable and stays whole.
❌ Ich durchschaue die Unterlagen.
Incorrect for 'I scan the documents' — inseparable durchSCHAUen means 'see through (a person/plan)', not literally scanning papers.
✅ Ich schaue die Unterlagen durch.
Correct — separable DURCHschauen is the literal 'look through' verb.
Key Takeaways
- durch-, über-, um-, unter-, wieder- (and hinter-) can be separable or inseparable.
- Stress decides everything: stressed prefix → separable → literal; stressed stem → inseparable → figurative.
- Each member takes a different participle: separable inserts -ge- (übergesetzt); inseparable takes none (übersetzt).
- Treat each pair as two distinct verbs. Say the verb aloud to fix its meaning before you write it.
Now practice German
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Start learning German→Related Topics
- Inseparable Prefix VerbsA2 — The eight prefixes that never split, never take ge-, and are stressed on the stem: be-, emp-, ent-, er-, ge-, miss-, ver-, zer-.
- Separable Verbs: How They SplitA2 — How German separable verbs detach their stressed prefix and send it to the end of a main clause.
- The Stress Test for SeparabilityB1 — Say the verb aloud and locate the stress: a stressed prefix means it separates, a stressed stem means it doesn't — the single reliable test that even disambiguates dual-prefix verbs.
- Participles of Separable and Inseparable VerbsB1 — Where the -ge- goes when a verb has a prefix: inside separable verbs, and nowhere in inseparable ones — predicted perfectly by stress.
- Separable Verbs with zu, Modals, and in Subordinate ClausesB1 — The three contexts where separable verbs do not split: with zu (nesting it inside), after a modal, and in verb-final subordinate clauses.
- High-Frequency Separable Verbs ReferenceA2 — A practical reference of the most common German separable verbs, grouped by prefix, with meanings, participles, and the correct Perfekt auxiliary.