Synonyms of swear by in English:

swear by

See US English definition of swear by

See UK English definition of swear by


1‘I swear by the Blessed Virgin that it fell into the sea’

invoke, appeal to, call as one's witness

2‘many of the locals swear by these computers’

express confidence in, have faith in, put one's faith in, trust, have every confidence in, believe in
set store by, value
informal rate