The smallest internal dimension of inner or outer ring or separator Also, the surface of the inner ring that fits against the shaft
(tidal): A tidal type wave which propagates up certain rivers, especially in wedge-shaped shoaling estuaries, at times of spring tides as a solitary wave with a steep leading edge Common in the estuaries discharging into the Gulf of Papua Also known elsewhere as eagre (England), pororóca (Brazil) or mascaret (France)
To perforate or penetrate, as a solid body, by turning an auger, gimlet, drill, or other instrument; to make a round hole in or through; to pierce; as, to bore a plank
You describe someone as a bore when you think that they talk in a very uninteresting way. There is every reason why I shouldn't enjoy his company -- he's a bore and a fool