Which to use
“sis” is a num and “stu” is an unknown - they look or sound alike but fill different roles in a sentence.
- #37,202
- “sis” frequency rank
- #47,032
- “stu” frequency rank
- 84234
- confusion score
Side-by-Side Comparison
| Feature | sis | stu |
|---|---|---|
| Definition | sechs (6) | Dativ Singular des Numerales sto |
Where the eye mixes sis and stu
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. sis (CVC) and stu (CCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between sis and stu
These two trip readers on the page rather than in the ear: sis is [sis] while stu is [stʊ]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (num vs unknown), which is usually the fastest check. Our composite confusion score for this pair is 84234, derived from the frequency rank of both members and their visual similarity.
sis is recorded at frequency rank #37,202, classified as anum, pronounced [sis]. stu is at rank #47,032, tagged as anunknown, pronounced [stʊ].
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 84234, this pair ranks #126,943 of 2,006,359 scored German confusable pairs - among the most confusable pairs.
Orthographic DNA of sis vs stu
Shared letters: s. Private to "sis": i. Private to "stu": tu.
"sis" · 3 letters · shape CVC · "stu" · 3 letters · shape CCV
Frequently Asked Questions
Do "sis" and "stu" mean the same thing in a sentence?
Frequency check: "sis" vs "stu" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sis" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "stu" - compare definitions side by side with the headword page. Word entry
- This pair ranks #126,943 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "sis" and "stu" also get mixed up with nearby pairs, the highest-scored neighbour is "seg vs stu". Nearby pair
Confusion rank #126,943 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.