Turn this distinction into automatic recall
Falando teaches Brazilian Portuguese through grammar, vocabulary, audio, examples, and spaced review, so confusing pairs stop feeling like guesses.
Quick answer
Sustar interrupts an action or effect. Suster supports or holds something back.
A reliable test is to identify the job of the word before translating from English.
What each word does
sustar
to suspend or halt
Use sustar for officially stopping the execution, progress, or effect of a measure.
suster
to sustain, restrain, or hold back
Use suster for supporting something or preventing movement, emotion, or decline.
How to choose
- sustar: Choose sustar if the sentence points to officially stopping the execution, progress, or effect of a measure.
- suster: Choose suster if the sentence points to supporting something or preventing movement, emotion, or decline.
Examples
O tribunal decidiu sustar a cobrança.
The court decided to suspend the charge.
Ela mal conseguiu suster o riso.
She could barely hold back her laughter.
Common trap
Their conjugations diverge: ele susta a medida, but ele sustém o peso or o impulso.
Practice it in context
Pick one sentence from your real life and write it twice: once with sustar, then once with suster. If both versions feel possible, name the meaning shift.
Turn this distinction into automatic recall
Falando teaches Brazilian Portuguese through grammar, vocabulary, audio, examples, and spaced review, so confusing pairs stop feeling like guesses.