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charade (n.): 1776, from French charade (18c.), probably from Provençal charrado "long talk, chatter," of obscure origin, perhaps from charrar "to chatter, gossip," of echoic origin. Compare Italian ciarlare, Spanish charlar "to talk, prattle." Originally not silent, but relying rather on enigmatic descriptions of the words or syllables.
As we have ever made it a Rule to shew our Attention to the Reader, by 'catching the Manners living, as they rise,' as Mr. Pope expresses it, we think ourselves obliged to give Place to the following Specimens of a new Kind of SMALL WIT, which, for some Weeks past, has been the Subject of Conversation in almost every Society, from the Court to the Cottage. The CHARADE is, in fact, a near Relation of the old Rebus. It is usually formed from a Word of two Syllables; the first Syllable is described by the Writer; then the second; they are afterwards united and the whole Word marked out .... [supplement to "The Universal Magazine of Knowledge and Pleasure," volumes 58-59, 1776]
Among the examples given are:

My first makes all nature appear of one face;
At the next we find music, and beauty and grace;
And, if this Charade is most easily read,
I think that the third shou'd be thrown at my head.

[The answer is "snow-ball."]

The silent form, the main modern form, was at first a variant known as dumb charades and at first it was not a speed contest; rather it adhered to the old pattern, and the performing team acted out all the parts in order before the audience team began to guess.
There is one species of charade which is performed solely by "dumb motions," somewhat resembling the child's game of "trades and professions"; but the acting charade is a much more amusing, and more difficult matter. ["Goldoni, and Modern Italian Comedy," in "The Foreign And Colonial Quarterly Review," Volume 6, 1846]
An 1850 book, "Acting Charades," reports that Charades en Action were all the rage in French society, and that "Lately, the game has been introduced into the drawing-rooms of a few mirth-loving Englishmen. Its success has been tremendous." Welsh siarad obviously is a loan-word from French or English, but its meaning of "speak, a talk" is closer to the Provençal original.
empiricism (n.): 1650s, in the medical sense, from empiric + -ism. Later in a general sense of "reliance on direct observation rather than theory," especially an undue reliance on mere individual experience; in reference to a philosophical doctrine which regards experience as the only source of knowledge from 1796.
Were I obliged to give a short name to the attitude in question, I should call it that of radical empiricism, in spite of the fact that such brief nicknames are nowhere more misleading than in philosophy. I say 'empiricism' because it is contented to regard its most assured conclusions concerning matters of fact as hypotheses liable to modification in the course of future experience; and I say 'radical,' because it treats the doctrine of monism itself as an hypothesis, and, unlike so much of the half way empiricism that is current under the name of positivism or agnosticism or scientific naturalism, it does not dogmatically affirm monism as something with which all experience has got to square. The difference between monism and pluralism is perhaps the most pregnant of all the differences in philosophy. [William James, preface to "The Sentiment of Rationality" in "The Will to Believe and Other Essays in Popular Philosophy," 1897]
liege (adj.): word used by a vassal to address his superior or lord in the feudal system, c. 1300, from Anglo-French lige (late 13c.), Old French lige "(feudal) liege, free, giving or receiving fidelity," perhaps from Late Latin laeticus "cultivated by serfs," from laetus "serf," which probably is from Proto-Germanic *lethiga- "freed" (cognates: Old English læt "half-freedman, serf;" Old High German laz, Old Frisian lethar "freedman"), from PIE root *le- "let go, slacken" (see let (v.)). Or the Middle English word may be directly from Old High German leidig "free." As a noun from late 14c., both as "vassal" and "lord." Hence, liege-man "a vassal sworn to the service and support of a lord, who in turn is obliged to protect him" (mid-14c.).
must (v.): Old English moste, past tense of motan "have to, be able to," from Proto-Germanic *mot- "ability, leisure (to do something)" (cognates: Old Saxon motan "to be obliged to, have to," Old Frisian mota, Middle Low German moten, Dutch moeten, German müssen "to be obliged to," Gothic gamotan "to have room to, to be able to"), perhaps from PIE root *med- "to measure, to take appropriate measures" (see medical (adj.)). Used as present tense from c. 1300, from the custom of using past subjunctive as a moderate or polite form of the present.
walk-over (n.): "easy victory," 1838, such as one that happens in the absence of competitors, when the solitary starter, being obliged to complete the event, can traverse the course at a walk. Transferred sense of "anything accomplished with great ease" is attested from 1902. To walk (all) over (someone) "treat with contempt" is from 1851.
welterweight (n.): 1831, "heavyweight horseman," later "boxer or wrestler of a certain weight" (1896), from earlier welter "heavyweight horseman or boxer" (1804), possibly from welt (v.) "beat severely" (c. 1400).
... but at the end of the first German mile, Nature gave way, and this excellent mare was obliged to "knock under" to the extraordinary exertions she had made, and to the welter weight she carried, upwards of 13 stone. ["The Sporting Magazine," September 1831]