Quote:
Originally Posted by ruff
The Difference between Bear and Bare
Besides being the name of a big furry animal, bear functions as a verb. It means to tolerate, to carry something, or to endure. ... The verb bare means to reveal or open something to view.
Bear vs. Bare—What's the Difference? | Grammarly
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Yep, the idiom is and always has been, "bears watching", as in, this "object or action can stand up to and potentially reward the scrutiny of required monitoring"
The Free Dictionary - bear watching