jeopardize (someone's) relationship

Translations
подвергать опасности (чьи-то) отношения
His constant lies could jeopardize their relationship.
Его постоянная ложь может подвергнуть опасности их отношения.
Definitions
To put someone's relationship at risk or in danger, potentially leading to harm, conflict, or a breakdown in the connection between individuals.
Words
relationship

noun
отношение
jeopardize

verb
подвергать опасности