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Latin word gubernaculum comes from Latin -culum, Latin guberno (To govern, manage. To pilot, steer a ship.)
-culum (Latin)
Suffix used to form some nouns derived from verbs, particularly nouns representing tools and instruments.
guberno (Latin)
To govern, manage. To pilot, steer a ship.
gubernaculum (Latin)
Management. The steering-oar, helm, rudder.