contact
The German word 'Kontakt' is used similarly to the English word 'contact'. It can refer to the act of communicating or interacting with someone, as well as the person or means of communication itself. For example, 'Ich habe Kontakt mit ihm aufgenommen' means 'I have made contact with him'.
We need to keep in touch.
This sentence is used when you want to stay in touch with someone, which means to keep or maintain contact.
I lost contact.
This sentence is used when you can't reach someone anymore or when you're unable to communicate with them, thus losing contact.
Can you please give me your contact?
This sentence is used when you are asking someone for their contact information, such as a phone number or email address.