1660s, from un- (1) not + conditional. Related: Unconditionally. Unconditional surrender in the military sense is attested from 1730; in U.S., often associated with Civil War Gen. Ulysses S. Grant and the taking of Fort Donelson. The ringing phrase of Grant's latest despatch circulated through the North like some coinage fresh from the mint, and Unconditional Surrender, which suited the initials of his modest signature, became like a baptismal name. [James Schouler, History of the United States of America, Dodd, Mead & Co., 1899].
Splitting Fingernails. Fingernails can crack and break because of several reasons. The most common factor being, nail-hardening products and nail polish that may be drying up the nails. However, sometimes health imbalances can also make the nails brittle and cause them to split. Fingernails are made up of a structural protein called keratin.
Purple line on nail: Fingernails can have many different signs. Purple lines may represent a couple different things; mole/freckle at the nail base or splinter hemorrhage. The latter is not specific to any disease state, but may be a sign of something else that is going on. If you recently injured your nail bed, that might be a sign of bruising.