Relationship (noun)

1. The way in which two or more concepts, objects, or people are connected, or the state of being connected.
2. A romantic or sexual association between two people.
3. A connection or association between people or groups.
4. The state of being related, or connected.
5. The state of being connected by blood or marriage.

Origin:

From middle english relacioun, from old french relacion, from latin relationem ("a relation, reference, account, report"), from relatus ("carried back, referred"), past participle of referre ("to bring back, refer"), from re- ("back") + ferre ("to brin.g")

Examples:

1. The relationship between the two countries has improved.
2. They have a strong relationship built on trust and communication.
3. She has a close relationship with her family.
4. The relationship between poverty and crime is complex.
5. Their relationship is strained by financial troubles.