Questions & Answers about Ważność wygasła wczoraj.
Here, ważność means validity — for example, the validity of a document, permit, contract, card, or certificate.
In other contexts, ważność can also mean importance, so the exact meaning depends on context. In this sentence, it clearly means validity.
Because ważność is a feminine singular noun, and in the past tense Polish verbs agree with the subject in gender and number.
So:
- ważność = feminine singular
- past tense of wygasnąć must match it
- therefore: wygasła
Compare:
- umowa wygasła = the contract expired
- paszport wygasł = the passport expired
- pozwolenie wygasło = the permit expired
The dictionary form is wygasnąć.
That verb means to expire, to lapse, or literally in some contexts to go out / die out.
In this sentence:
- wygasnąć = infinitive
- wygasła = past tense, feminine singular