By means of the small grooves A and B, however, the point is thinned while the strength of the drill is left unimpaired. "Modern Machine-Shop Practice, Volumes I and II" by Joshua Rose

And though they have both many titles to glory, yet judicious persons think nothing so much to their credit as that their friendship should have remained from beginning to end unimpaired through so many important crises, campaigns, and administrations. "Plutarch's Lives, Volume II" by Aubrey Stewart & George Long