anastomosarse

A technical medical and anatomical term: for two blood vessels, ducts, or nerve branches to connect or join, forming an anastomosis — dos arterias se anastomosan en ese punto. It's essentially confined to medical and biological writing.

• Las dos arterias se anastomosan cerca del codo. — The two arteries anastomose near the elbow.
• El cirujano unió los segmentos de intestino para que se anastomosaran. — The surgeon joined the bowel segments so they would anastomose.
• Estas venas se anastomosan formando una red compleja. — These veins anastomose, forming a complex network.

Using anastomosarse outside medical or anatomical contexts — for general 'joining' or 'connecting' in everyday speech, use unirse or conectarse instead.

Often confused with unirse.