ströng

Stramme. Strengja. Ströng.

Is strong from the same root? It seems not, and yet, how strange. Einar Tambarskelvir's strength lay in his bow, for all the good it did him or the men of the Long Serpent.

Allir hoyrdu streingin springa
Kongurin seg undrar --

Ströng to me sounds like something bound tightly for support, to strengthen the joints of it, to make it fast in the face of what might come.