Adjective
Not observed or foreseen; unexpected; -- generally with for.
Source: Webster's dictionaryNor Fame I slight, nor for her favors call She comes unlooked for, if she comes at all . Alexander Pope
In a battle, as in a siege, the art consists in concentrating very heavy fire on a particular point. The line of battle once established, the one who has the ability to concentrate an unlooked for mass of artillery suddenly and unexpectedly on one of these points is sure to carry the day. Napoleon Bonaparte
The great and unlooked for discoveries that have taken place of late years have all concurred to lead many men into the opinion that we were touching on a period big with the most important changes. Thomas Malthus