Fast: Hold

: Articles from the Catalina Island Marine Institute describe how these structures are perfectly adapted to cement organisms firmly against strong ocean currents. Theology & Philosophy

: The University of Rhode Island explains how holdfasts provide protected environments for juvenile fish and other marine life. hold fast

"Hold fast" is a common biblical exhortation, often interpreted as staying committed to faith or truth during times of trial. : Articles from the Catalina Island Marine Institute

In biology, a is a root-like structure that anchors organisms (like kelp or seaweed) to rocks or other surfaces. hold fast

: Resources like Redeemer Church discuss the theme in the Book of Hebrews, where it refers to an open and public acknowledgment of hope.