simple past tense of bear up

simple past tense of bear down

To enlarge the diameter of a round hole by boring.

simple past tense of bear out

simple past tense of bear witness

A clam, Tridacna crocea, capable of burrowing even through rock.

plural of boring clam

The intersection of an existing underground utility or underground structure by a second utility, resulting in direct contact between the transactions of the utilities that compromises the integrity of either utility or underground structure.

(of an insect) That bores through wood.

(firearms) An optical device, mounted on or near the end of a firearm's barrel, used to align the sights with the bore.