cement
to strengthen the bond in a relationship
jeopardise
to put someone in a situation where they are in danger of loss, harm, or failure
sever
to put an end to something
foster
to encourage the development of something
undermine
to lessen the effectiveness of something
resume
to begin again after a pause
sour
to become less friendly or enjoyable
restore
to bring back; to re-establish
damage
to harm the normal functioning of something
disrupt
to stop the normal flow of interaction
