to visit someone casually and without an appointment
rendre visite à quelqu'un de manière informelle et sans rendez-vous (rendre visite à quelqu'un de manière informelle et sans rendez-vous)
"We decided to drop in on our cousins while passing through their town."
"Nous avons décidé de drop in on nos cousins en passant par leur ville." (nous avons decide de **drop in on** nos cousins en passant par leur ville)
to enter a period of economic decline
to do something that is new or challenging for personal grow...
to establish regulations for trading activities
to reveal something that was hidden or unclear
to develop a close relationship through shared interests or...
to reduce or reverse a policy or program