saivssiaWhich spelling fits?

Quick tell: sai is a verb, sia is a pronoun, so they fill different roles in a sentence.

Which to use

“sai” is a verb and “sia” is a pronoun - they look or sound alike but fill different roles in a sentence.

#47,708
“sai” frequency rank
#32,768
“sia” frequency rank
80476
confusion score

Side-by-Side Comparison

Feature sai sia
Definition 2. Person Singular Indikativ Präsens Aktiv des Verbs sapere sein(e) [eigene(r, -s)], ihr(e) [eigene(r, -s)]

Letter map: sai vs sia

Shared letters muted; letters that set sai and sia apart highlighted. Shared run: 2. sai and sia follow the identical consonant-vowel pattern (CVV). Same shape at a glance is often the real trap, independent of shared letters.

3 ch
sai
3 ch
sia

Role in the sentence - sai and sia

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sai is averb and siaapronoun. On the page they differ only by swapping two adjacent letters (ai ↔ ia) - a transposition the eye reads straight past. Our composite confusion score for this pair is 80476, derived from the frequency rank of both members and their visual similarity.

sai is recorded at frequency rank #47,708, classified as averb, pronounced [ˈsai̯]. sia is at rank #32,768, tagged as apron.

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 80476, this pair ranks #194,799 of 2,006,359 scored German confusable pairs - among the most confusable pairs.

Orthographic DNA of sai vs sia

Shared letters: ais. Private to "sai": -. Private to "sia": -.

"sai" · 3 letters · shape CVV  ·  "sia" · 3 letters · shape CVV

Frequently Asked Questions

Do "sai" and "sia" mean the same thing in a sentence?
No - they are not even the same part of speech. "sai" is a verb and "sia" a pronoun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "sai" or "sia"?
"sia" is the more common of the two: it sits at frequency rank #32,768 in our German list, against #47,708 for "sai". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "sai" vs "sia" is on the table, pick a follow-up below.

  • Full dictionary entry for "sai" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sia" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #194,799 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "sai" and "sia" also get mixed up with nearby pairs, the highest-scored neighbour is "sai vs seg". Nearby pair

Confusion rank #194,799 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list