Etymology
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Words related to how

*kwo- 
also *kwi-, Proto-Indo-European root, stem of relative and interrogative pronouns.

It forms all or part of: cheese (n.2) "a big thing;" cue (n.1) "stage direction;" either; hidalgo; how; kickshaw; neither; neuter; qua; quality; quandary; quantity; quasar; quasi; quasi-; query; quib; quibble; quiddity; quidnunc; quip; quodlibet; quondam; quorum; quote; quotidian; quotient; ubi; ubiquity; what; when; whence; where; whether; which; whither; who; whoever; whom; whose; why.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit kah "who, which;" Avestan ko, Hittite kuish "who;" Latin quis/quid "in what respect, to what extent; how, why," qua "where, which way," qui/quae/quod "who, which;" Lithuanian kas "who;" Old Church Slavonic kuto, Russian kto "who;" Old Irish ce, Welsh pwy "who;" Old English hwa, hwæt, hwær, etc.
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anyhow (adv.)
1740, "in any way or manner," from any + how (adv.). Unlike most other any + (interrogative) compounds, there is no record of it in Old or Middle English. Compare anyway (16c.). Also used as a conjunction, "in any case." Emphatic form any old how is recorded from 1900, American English.
however (adv., conj.)
late 14c., from how + ever.
howsoever (adv.)
late 14c., how so evere "no matter how, however," an emphatic form of how-so "in what(ever) way" (late Old English hu se), from how (adv.) + so (adv.); + ever.

A parallel and earlier form in Middle English was howsomever (early 14c.), which survived through 18c. in provincial English and after that was counted a vulgar Americanism by English writers; it is the same compound but with the obsolete conjunction sum, from Old Norse sem "as, that" (cognate with Danish and Swedish som) in place of so.
know-how (n.)
also knowhow, "technical expertise," 1838, American English, from know (v.) + how (adv.).
nohow (adv.)

1775, "not at all, in no manner, not in any way," colloquial, from no + how, on model of nowhere. In old slang also "out of sorts" (1779).

somehow (adv.)
1660s, "in some way not yet known," from some + how. First attested in phrase somehow or other.