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trench [trench 词源字典]: trench: [14] A trench is etymologically something ‘cut’ or ‘sliced’. The word was borrowed from Old French trenche ‘slice, cutting, ditch’, a derivative of trenchier ‘cut’ (from which English gets trenchant [14]). And this in turn went back to Latin truncāre ‘cut, mutilate’ (source of English truncate [15]), a derivative of truncus ‘tree-trunk, torso’ (source of English trunk) – the semantic link being the ‘cutting’ of branches from a tree or of limbs from a body.

The sense ‘ditch’ for trench comes of course from the notion of ‘cutting’ a long narrow hole in the ground (a similar inspiration underlies cutting ‘excavation for a railway, road, etc’). Trencher ‘platter’ [14] came from the Anglo-Norman derivative trenchour, and originally denoted both a board for ‘cutting’ food up on and a ‘slice’ of bread used as a plate.
=> trenchant, trencher, truncate, trunk[trench etymology, trench origin, 英语词源]
slaw (n.): "sliced cabbage," 1794, from Dutch sla, short for salade, from French salade (see salad).
slice (v.): late 15c., from Middle French esclicier, from Old French escliz (see slice (n.)). Golfing sense is from 1890. Related: Sliced; slicing. Sliced bread introduced 1958; greatest thing since ... first attested 1969.
No matter how thick or how thin you slice it it's still baloney. [Carl Sandburg, "The People, Yes," 1936]
split (n.): 1590s, "narrow cleft, crack, fissure," from split (v.). Meaning "piece of wood formed by splitting" is from 1610s. Meaning "an act of separation, a divorce" is from 1729. From 1861 as the name of the acrobatic feat. Meaning "a drink composed of two liquors" is from 1882; that of "sweet dish of sliced fruit with ice cream" is attested from 1920, American English. Slang meaning "share of the take" is from 1889. Meaning "a draw in a double-header" is from 1920.
pho: "A type of Vietnamese soup, typically made from beef stock and spices to which noodles and thinly sliced beef or chicken are added", Vietnamese, perhaps from French feu (in pot-au-feu).