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German · Pronunciation Guide

How do you pronounce "der Fluss" in German?

dair FLOOSS. A short rounded 'oo' — the doubled ss is the spelling's signal that the vowel is short.

der Fluss /deːɐ̯ flʊs/

The ss is telling you the vowel is short, which is the whole point of the spelling. Set it against Fuß, which has ß and a long vowel: the two words differ in vowel length, and German signals that difference purely through the choice of ss or ß. The plural Flüsse fronts the vowel to a short ü.

Listen: der Fluss

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Sound it out

Fl An f and a bright, forward l.
u Short 'oo' as in put, genuinely rounded.
ss An unvoiced hiss. Double s appears after short vowels; ß appears after long ones, which is the whole modern rule.

Hear it in a sentence

Der Fluss ist sehr breit.

The river is very wide.

Listen: Der Fluss ist sehr breit.

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Der Fluss ist sehr breit closes on breit with the 'eye' diphthong and a throaty r. So the sentence has a short clipped vowel in the noun and a long diphthong in the adjective, which is a useful contrast to hear in a single short statement.

Where English speakers slip

The ss-versus-ß distinction is the thing to take away, because it governs vowel length across the whole language: Fluss is short, Fuß is long, and the spelling tells you which before you hear the word. Learners also unround the u toward the vowel of English fluss-like words — keep the lips genuinely rounded.