The word stool came to have its present special meaning through the coming into English from the French of the word chair. Before the Norman Conquest any kind of seat for one person was a "stool," even sometimes a royal throne. The word deer also had in Old English the meaning of "beast" in general, but the coming in of the word beast from the French led to its falling into disuse, and by degrees it became the special name of the chief beast of chase.
Again, the Latin word spirit led to the less frequent use of the word ghost, which was previously the general word for spirit. When spirit came to be generally used, ghost came to have the special meaning which it has for us now—that of the apparition of a dead person.
A great many words have changed their meaning even since the time of Shakespeare through being transferred from the subject of the feeling they describe to the object, or from the object to the subject. Thus one example of this is the word grievous. We speak now of a "grievous wrong," or a "grievous sin," or a "grievous mistake," and all these phrases suggest a certain sorrow in ourselves for the fact described. But this was not the case in the time of Queen Elizabeth, when it was decreed that a "sturdy beggar," a man who could work but begged instead, should be "grievously whipped." In this case grievously merely meant "severely." On the other hand, the word pitiful, which used to mean "compassionate," is no longer applied to what we feel at seeing a sad thing, but to the sadness of the thing itself. We do not now say a person is pitiful when he feels sorry for some one, but we speak of a "pitiful sight" or a "pitiful plight."
The word pity itself is used still in both ways, subjectively and objectively. A person can feel "pity," and there is "pity" in the thing for which we feel sorry. This is the sense in which it is used in such expressions as "Oh, the pity of it!"
The word hateful once meant "full of hate," but came to be used for the thing inspiring hate instead of for the people feeling it. So, painful used to mean "painstaking," but of course has no longer this meaning.
One very common way in which words have changed their meanings is through the name of one thing being given to another which resembles it. The word pen comes from the Latin penna, "a feather;" and as in olden days the ordinary pens were "quills" of birds, the name was very good. We still keep it, of course, for the steel pens and gold pens of to-day, which we thus literally speak of as feathers. Pencil is a word with a somewhat similar history. It comes from the Latin penicillus, which itself came from peniculus, or "little tail," a kind of cleaning instrument which the Romans used as we use brushes. Pencil was originally the name of a very fine painter's brush, and from this it became the name of an instrument made of lead which was used for making marks. Then it was passed on to various kinds of pencils, including what we know as a lead-pencil, in which, as a writer on words has pointed out, there is really neither lead nor pencil.
The word handkerchief is also an interesting word. The word kerchief came from the French couvre-chef, "a covering for the head." Another similar word is one which the Normans brought into England, curfew, which means "cover fire." When the curfew bell rang the people were obliged to extinguish all lights and fires. The "kerchief" was originally a covering for the head. Then the fashion arose of carrying a square of similar material in the hand, and so we get handkerchief, and later pocket-handkerchief, which, if we analyse it, is rather a clumsy word, "pocket-hand-cover-head." The reason it is so is that the people who added pocket and hand knew nothing of the real meaning of kerchief.
There are several words which used to mean "at the present time" which have now come to mean "at a future time." This can only have come about through the people who used them not keeping their promises, but putting off doing things until later. The word soon in Old English meant "immediately," so that when a person said that he would do a thing soon he meant that he would do it "instantly." The trouble was that often he did not, and so often did this happen that the meaning of the word changed, and soon came to have its present meaning of "in a short time." The same thing happened with the words presently and directly, and the phrase by-and-by, all of which used to mean "instantly." Presently and directly seem to promise things in a shorter time than soon, but by-and-by is a very uncertain phrase indeed. It is perhaps because Scotch people are superior to the English in the matter of doing things to time that with them presently still really means "instantly."
In all the examples we have seen of changes in the meaning of words it is fairly easy to see how the changes have come about. But there are some words which have changed so much in meaning that their present sense seems to have no connection with their earlier meaning. The word treacle is a splendid example of this. It comes from a Greek word meaning "having to do with a wild beast," and this seems to have no connection whatever with our present use of the word treacle as another word for syrup of sugar. The steps by which this word came to change its meaning so enormously were these. From the general meaning of "having to do with a wild beast," it came to mean "remedy for the bite of a wild beast." As remedies for wounds and bites were, in the old days, generally thick syrups, the word came in time to mean merely "syrup," and lastly the sweet syrup which we now know as "treacle."
Another word which has changed immensely in its meaning is premises. By the word premises we generally mean a house or shop and the land just round it. But the real meaning of the word premises is the "things already mentioned." It came to have its present sense from the frequent use of the word in documents drawn up by lawyers. In these, which very frequently dealt with business relating to houses, the "things before mentioned" meant the "house, etc.," and in time people came to think that this was the actual meaning of premises, and so we get the present use of the word.