Here's how the word evolved:
* French: carène (keel)
* English: careen (to tilt a ship onto its side for repairs)
The English word "careen" originally meant "to heel over," referring to the action of tilting a ship onto its side for repairs. This action involved the ship's keel being exposed, hence the connection to the French word "carène."
While the word "careen" itself is not of Germanic or Norse origin, it's interesting to note that the concept of ship repairs and the use of keels would have been relevant in those cultures.