wsunąć się in English:

She was weak and I saw her falter.

others would always falter

I'll bring it. You falter every time you try to walk.

His voice faltered as he began his speech.

‘But – my other ear is not pierced,’ I faltered.

Their courage will never falter.

The economy is beginning to falter.

He never falters when he has to make a decision.

His courage will never falter / A man was faltering on the road and we almost knocked him down/He never falters when he has to make a decision.

He gives no hint of faltering and drawing back.

Her friends never faltered in their beliefin her.

she faltered at the sight of the black-clad women

No time to falter, no turning back

I was so tired that my voice faltered.