Origin and history of widow

1520s, the earliest recorded sense is "mistress;" the allusion to grass is not clear, but it commonly was believed to refer to casual bedding (compare bastard and German Strohwitwe, literally "straw-widow," and compare the expression give (a woman) a grass gown "roll her playfully on the grass" (1580s), also euphemistic for the loss of virginity). Revived late 18c. as "one that pretends to have been married, but never was, yet has children;" in early 19c. use it could mean "married woman whose husband is absent" (and often presumed, but not certainly known to be, dead), also often applied to a divorced or discarded wife or an unmarried woman who has had a child. Both euphemistic and suggestive.

[G]rasse wydowes ... be yet as seuerall as a barbours chayre and neuer take but one at onys. [More, 1528]

GRASS WIDOW, s. a forsaken fair one, whose nuptials, not celebrated in a church, were consummated, in all pastoral simplicity, on the green turf. [Rev. Robert Forby, "Vocabulary of East Anglia," London, 1830]

originally noting opposition, competition, entanglement, but in Middle English shifting to note association or connection; proximity, harmony, alliance.

It is from Old English wið "against, opposite, from;" also "toward, by, near." The sense shifted in Middle English to denote association, combination, and union, partly by influence of Old Norse cognate viðr "against," but also "toward, at," and also perhaps by association with Latin cum "with" (as in pugnare cum "fight with"). Also compare obsolete wine "friend," related to win "to strive, struggle, fight" (see win (v.)) probably on the notion of "comrade-in-arms."

In this sense denoting company or connection it replaced Old English mid, which survives as a prefix (as in midwife; see mid (prep.)). The original sense of "against, in opposition" is retained in compounds such as withhold, withdraw, withstand.

The Old English word is a shortened form related to the first element in widdershins, from Proto-Germanic *withro- "against" (source also of Old Saxon withar "against," Middle Dutch, Dutch weder, Dutch weer "again," Gothic wiþra "against, opposite").

This is reconstructed to be from PIE *wi-tero-, literally "more apart," suffixed form of *wi- "separation" (source also of Sanskrit vi "apart," Avestan vi- "asunder," Sanskrit vitaram "further, farther," Old Church Slavonic vutoru "other, second"). Compare widow (n.).

Phrase with child "pregnant" is recorded from c. 1200. With it "cool, hip, up-to-date" is recorded by 1931 in Black English. What's with? "what are the circumstances of or explanation for" is by 1940.

With and by are so closely allied in many of their uses that it is impossible to lay down a rule by which these uses may at all times be distinguished. The same may be said, but to a less extent, of with and through. [Century Dictionary, 1891]

French avec "with" was originally avoc, from Vulgar Latin *abhoc, from apud hoc, literally "with this."