ketjukäyrä (Finnish) comes from Finnish ketju, from Swedish kedja, from Latin catēna, from Proto-Indo-European kat- — cub; to weave, to braid; to link or weave...
ketjukäyrä (Finnish): catenary
Definitions
catenary
Ancestry of “ketjukäyrä”, step by step
ketjukäyrä traces back through two separate lines of ancestry.