https://dictionary.cambridge.org/dictionary/english/perseverance
perseverance
UK /ˌpɜː.sɪˈvɪə.rəns/ US /ˌpɝː.səˈvɪr.əns/
Why is the stress on vɪr not on sə?
https://dictionary.cambridge.org/dictionary/english/perseverance
perseverance
UK /ˌpɜː.sɪˈvɪə.rəns/ US /ˌpɝː.səˈvɪr.əns/
Why is the stress on vɪr not on sə?
Perseverance shares an etymology with the word 'severe' (grave, serious) which has the same emphasis in its pronunciation.
I suspect you might be assuming it should be pronounced with the same emphasis as in the word 'severance', but this comes from the word 'sever' (to separate), which is a different word entirely with a different etymology.
'Severe' comes directly from the Latin severus, whereas 'sever' comes indirectly from the Latin separare.