1. Godan verb with 'ru' ending, Intransitive verb

   to be connected (to); to be joined together; to be linked; to be tied together; to lead (to)

   Usually written using kana alone

   その村と我々の町は橋でつながっています。

2. to connect (of a telephone call, the internet, etc.); to get through

   Usually written using kana alone

3. to lead (to an outcome); to bring about (a result)

   Usually written using kana alone

4. to be lined up (e.g. of cars); to extend; to stretch out

   Usually written using kana alone

5. to be related (e.g. to a matter); to be connected (to); to have something to do (with)

   Usually written using kana alone

6. to be related (by blood)

   Usually written using kana alonesee 血がつながる

Also written 接続る【つながる】tsunagaru