assistirvsassustarWhat's the difference?

Which to use

“assistir” and “assustar” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#1,456
“assistir” frequency rank
#11,394
“assustar” frequency rank
12850
confusion score

Side-by-Side Comparison

Feature assistir assustar
Definition prestar assistência; proteger; auxiliar; ajudar; socorrer: provocar susto ou receio; intimidar:

Where the eye mixes assistir and assustar

Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. assistir and assustar follow the identical consonant-vowel pattern (VCCVCCVC). Same shape at a glance is often the real trap, independent of shared letters.

8 ch
assistir
8 ch
assustar

Visual trap between assistir and assustar

A purely visual mix-up. assistir (/ɐ.siʃ.ˈtiɾ/) and assustar (/ɐ.suʃ.ˈtaɾ/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 12850, derived from the frequency rank of both members and their visual similarity.

assistir is recorded at frequency rank #1,456, classified as averb, pronounced /ɐ.siʃ.ˈtiɾ/. assustar is at rank #11,394, tagged as averb, pronounced /ɐ.suʃ.ˈtaɾ/.

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 12850, this pair ranks #59,625 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of assistir vs assustar

Shared letters: arst. Private to "assistir": i. Private to "assustar": u.

"assistir" · 8 letters · shape VCCVCCVC  ·  "assustar" · 8 letters · shape VCCVCCVC

Known mistypes of this pair

  • assistir ← asisstir · asistir · assisitr · assisstir · assistirr · assistri · assisttir · assitsir
  • assustar ← asssutar · assusatr · assusstar · assustarr · assustra · assusttar · assutsar · asusstar

Frequently Asked Questions

Is swapping "assistir" for "assustar" ever safe?
No. They are said differently (/ɐ.siʃ.ˈtiɾ/ versus /ɐ.suʃ.ˈtaɾ/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "assistir" vs "assustar" - which ranks higher?
"assistir" is the more common of the two: it sits at frequency rank #1,456 in our Portuguese list, against #11,394 for "assustar". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "assistir" and "assustar" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "assistir" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "assustar" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #59,625 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "assistir" and "assustar" also get mixed up with nearby pairs, the highest-scored neighbour is "assentar vs assustar". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #59,625 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list