swear by
US /swer baɪ/
UK /swer baɪ/

1.
jurar por, acreditar firmemente em
to believe strongly in the effectiveness or truth of something
:
•
My grandmother swears by this herbal remedy for colds.
Minha avó jura por este remédio herbal para resfriados.
•
Many chefs swear by fresh, local ingredients.
Muitos chefs juram por ingredientes frescos e locais.