swear by

UK
/swɛə baɪ/
US
/swɛr baɪ/
swear byverb
swore by
Past Simple
sworn by
Past Participle
swearing by
ing-form
UK
/swɛə baɪ/
US
/swɛr baɪ/
Translations
I swear by this brand of coffee; it's the best.
Я клянусь этой маркой кофе; это лучший.
Definitions
To have great confidence in or to strongly endorse something or someone.
She swears by this brand of coffee for its rich flavor.