He had been for many years, a quiet silent man, associating but little with other men, and used to companionship with his own thoughts. He had never known before the strength of the want in his heart for the frequent recognition of a nod, a look, a word; or the immense amount of relief that had been poured into it by drops through such small means.
Charles Dickens, Hard Times
isolation, loneliness, sadness, solitude