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crisscross: crisscross: [16] Crisscross is an alteration of Christscrosse, a term used from the 16th to 18th centuries for the figure of a cross (not specifically, as the name would seem to suggest, the crucifix). Gradually the original signification of the first syllable came to be lost, and the term fell into the pattern of reduplicated words (such as flipflop, singsong) in which a syllable is repeated with variation of the vowel. This may have contributed to the broadening of the word’s meaning to ‘pattern of repeated crossings’, which happened in the 19th century.
gay: gay: [13] English borrowed gay from Old French gai, an adjective of uncertain origin connected by some with Old High German gāhi ‘sudden, impulsive’. ‘Happy’ is its ancestral meaning, stretching back to Old French gai. The 20thcentury sense ‘homosexual’, which first came into general use in the 1950s, can probably be traced back to the 17th-century meaning ‘sexually dissolute’.

By the early 19th century it was being applied specifically to the world of prostitution, and it seems not unlikely that male prostitutes and their male clients could have been the vector for the present-day usage. A reported 1868 song by the US female impersonator Will S. Hays was supposedly called ‘The Gay Young Clerk in the Dry Goods Store’, but it is not entirely clear what ‘gay’ is supposed to have meant here, and the earliest reliable printed record of the ‘homosexual’ sense is from 1933.

The adjective underwent a further semantic flipflop in the early 21st century, when kids’ slang commandeered it, paradoxically, for ‘sad’.
slip: slip: There are three separate words slip in English. The verb [13] was probably borrowed from Middle Low German slippen, a product of the prehistoric Germanic base *slip-. This in turn went back to Indo-European *sleib- (source also of English lubricate [17]), a variant of the base which gave English slide. Slippery [16] was based on an earlier and now defunct slipper ‘slippery’, which also goes back to Germanic *slip-.

It may have been coined by the Bible translator Miles Coverdale, who used it in Psalm 34:6: ‘Let their way be dark and slippery’. It is thought that he modelled it on German schlipfferig ‘slippery’, used in the same passage by Martin Luther in his translation of the Bible. Slipper ‘soft shoe’ [15] was originally a shoe ‘slipped’ on to the foot; and someone who is slipshod [16] is etymologically wearing ‘loose shoes’. Slip ‘thinned clay’ [OE] is descended from Old English slypa ‘slime’, and may be related to slop [14].

One of its earlier meanings was ‘dung’, which is fossilized in the second element of cowslip. Slip ‘strip, piece’ [15], as in a ‘slip of paper’, was probably borrowed from Middle Low German or Middle Dutch slippe ‘cut, slit, strip’.
=> lubricate, slide; cowslip, slop
chip (n.1): Old English cipp "piece of wood," perhaps from PIE root *keipo- "sharp post" (cognates: Dutch kip "small strip of wood," Old High German kipfa "wagon pole," Old Norse keppr "stick," Latin cippus "post, stake, beam;" the Germanic words perhaps borrowed from Latin).

Meaning "counter used in a game of chance" is first recorded 1840; electronics sense is from 1962. Used for thin slices of foodstuffs (originally fruit) since 1769; specific reference to potatoes is found by 1859 (in "A Tale of Two Cities"); potato chip is attested by 1879. Meaning "piece of dried dung" first attested 1846, American English.

Chip of the old block is used by Milton (1642); earlier form was chip of the same block (1620s); more common modern phrase with off in place of of is early 20c. To have a chip on one's shoulder is 1830, American English, from the custom of a boy determined to fight putting a wood chip on his shoulder and defying another to knock it off. When the chips are down (1940s) is from the chips being down on the table after the final bets are made in a poker match.
grip (v.): Old English grippan "to grip, seize, obtain" (class I strong verb; past tense grap, past participle gripen), from West Germanic *gripjan (cognates: Old High German gripfen "to rob," Old English gripan "to seize;" see gripe (v.)). Related: Gripped; gripping. French gripper "to seize," griffe "claw" are Germanic loan-words.
navy (n.): early 14c., "fleet of ships," especially for purposes of war, from Old French navie "fleet; ship," from Latin navigia, plural of navigium "vessel, boat," from navis "ship" (see naval). Meaning "a nation's collective, organized sea power" is from 1530s. The Old English words were sciphere (usually of Viking invaders) and scipfierd (usually of the home defenses). Navy blue was the color of the British naval uniform. Navy bean attested from 1856, so called because they were grown to be used by the Navy.
pip (n.2): "disease of birds," late 14c., probably from Middle Dutch pippe "mucus," from West Germanic *pipit (cognates: East Frisian pip, Middle High German pfipfiz, German Pips), an early borrowing from Vulgar Latin *pippita, unexplained alteration of Latin pituita "phlegm" (see pituitary).
slip (n.4): "sprig or twig for planting or grafting, small shoot," late 15c., of uncertain origin. Compare Middle Dutch slippe, German schlippe, schlipfe "cut, slit, strip." Hence "young person of small build" (1580s, as in a slip of a girl); see slip (n.1).
tip (n.1): c. 1400, "extreme end of something, top of something round or pointed, metal attachment to the end of something," from Middle Low German or Middle Dutch tip "utmost point, extremity, tip" (compare German zipfel, a diminutive formation); or from a Scandinavian source (compare Old Norse typpi).
whip (v.): mid-13c., wippen "flap violently," not in Old English, of uncertain origin, ultimately from Proto-Germanic *wipjan "to move back and forth" (cognates: Danish vippe "to raise with a swipe," Middle Dutch, Dutch wippen "to swing," Old High German wipf "swing, impetus"), from PIE *weip- "to turn, vacillate, tremble" (see vibrate). "The senses of both [noun and verb] no doubt represent several independent adoptions or formations" [OED]. The cookery sense is from 1670s. Related: Whipped; whipping. Whip snake first recorded 1774, so called for its shape.
worship (n.): Old English worðscip, wurðscip (Anglian), weorðscipe (West Saxon) "condition of being worthy, dignity, glory, distinction, honor, renown," from weorð "worthy" (see worth) + -scipe (see -ship). Sense of "reverence paid to a supernatural or divine being" is first recorded c. 1300. The original sense is preserved in the title worshipful "honorable" (c. 1300).