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| gimlet | |||
| drills | |||
| boron (Borium) | |||
| boron A very hard almost colourless crystalline metalloid element that in impure form exists as a brown amorphous powder. It occurs principally in borax and is used in hardening steel | |||
| drill | |||
| bur; burr; dental drill; milling cutter; plough drill; trepan; trephine | |||
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| borers | |||
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| to bore; to drill | |||
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bor : 91 phrases, 20 sujets |