Etymology
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A.B. 

affixed to a name, abbreviation of Modern Latin Artium Baccalaureus "Bachelor of Arts" (see bachelor), 1773, American English. British English preferred B.A., perhaps because A.B. was used in Britain to mean able-bodied on seamen's papers.

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Jock 
c. 1500, variant of the masc. proper name Jack, the by-form of John. In Scotland and northern England it is the usual form. Since 1520s, like Jack, it has been used generically, as a common appellative of lads and servants, as the name of a typical man of the common folk, of a Scottish or North Country seaman, etc.
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Columbus 

his name is Latinized from his native Italian Cristoforo Colombo, in Spanish Cristóbal Colón.

America was discovered accidentally by a great seaman who was looking for something else, and most of the exploration for the next fifty years was done in the hope of getting through or around it. [S.E. Morison, "The Oxford History of the United States," 1965]
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Wehrmacht (n.)

"the armed forces of Germany," 1935, from German Wehrmacht (name of the armed forces 1921-1945), from Wehr "defense" (from PIE root *wer- (4) "to cover") + Macht "might" (from PIE root *magh- "to be able, have power").

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Gaylord 
masc. proper name, also a surname (from early 13c.), also Galliard, from Old French Gaillart, from Proto-Germanic *Gailhard "lofty-hard;" or from Old French gaillard "lively, brisk, gay, high-spirited," from PIE root *gal- (3) "to be able, have power."
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H 

eighth letter of the alphabet; it comes from Phoenician, via Greek and Latin. In Phoenician it originally had a rough guttural sound like German Reich or Scottish loch. In Greek at first it had the value of Modern English -h-, and with this value it passed into the Latin alphabet via Greek colonies in Italy. Subsequently in Greek it came to be used for a long "e" sound; the "h" sound being indicated by a fragment of the letter, which later was reduced to the aspiration mark.

In Germanic it was used for the voiceless breath sound when at the beginning of words, and in the middle or at the end of words for the rough guttural sound, which later came to be written -gh.

The sound became totally silent in Vulgar Latin and in the languages that emerged from it; thus the letter was omitted in Old French and Italian, but it was restored pedantically in French and Middle English spelling, and often later in English pronunciation. Thus Modern English has words ultimately from Latin with missing -h- (able, from Latin habile); with a silent -h- (heir, hour); with a formerly silent -h- now often vocalized (humble, humor, herb); and even a few with an unetymological -h- fitted in confusion to words that never had one (hostage, hermit). Relics of the formerly unvoiced -h- persist in pedantic insistence on an historical (object) and in obsolete mine host.

The pronunciation "aitch" was in Old French (ache "name of the letter H"), and is from a presumed Late Latin *accha (compare Italian effe, elle, emme), with the central sound approximating the rough, guttural value of the letter in Germanic. In earlier Latin the letter was called ha. The use in digraphs (as in -sh-, -th-) goes back to the ancient Greek alphabet, which used it in -ph-, -th-, -kh- until -H- took on the value of a long "e" and the digraphs acquired their own characters. The letter passed into Roman use before this evolution, and thus retained there more of its original Semitic value.

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