Have confidence in
'have confidence in' is the definition.
(synonyms)
This is all the clue.
(Other definitions for trust that I've seen before include "Fidelity" , "Rely on" , "Faith - guardianship - after 10, the owners of the Guardian" , "Have faith in, regard as reliable" , "Pin one's faith on" .)
'have confidence in' is the definition.
(synonyms)
This is all the clue.
(Other definitions for swear by that I've seen before include "Express great confidence in" , "Have total faith in" , "Rely on" , "Have utter faith in" .)