Forth
来自Big Physics
Old English, of Germanic origin; related to Dutch voort and German fort, from an Indo-European root shared by fore-.
wiktionary
From Middle English forth, from Old English forþ, from Proto-Germanic *furþą, from Proto-Indo-European*pŕ̥-to-, from *per-. Cognate with Dutch voort. See also ford.
From fourth; compare forty.
etymonline
forth (adv.)
Old English forð "forward, onward, farther; continually;" as a preposition, "during," perfective of fore, from Proto-Germanic *furtha- "forward" (source also of Old Frisian, Old Saxon forth "forward, onward," Old Norse forð, Dutch voort, German fort), from extended form of PIE root *per- (1) "forward." The construction in and so forth was in Old English.
