1. create/sever/restore ties or a connection
build bridges between, burn your bridges
A 'bridge' between people is a connection or relationship that they share. If you 'burn bridges' with someone, you destroy your path somewhere or connections to someone. When you 'burn your bridges' you sabotage your opportunities and advantages. If you 'build bridges' you succeed in connecting to others or nurturing relationships between different contacts or organisations. When you 'mend bridges' you repair relationships that have broken down or which have fallen apart. These are all figurative expressions used in casual and professional contexts.