W

wadge (noun)
Bunch, bundle. (MW)

waiter rule (social theory)
One's true character can be gleaned from how one treats staff or service workers, such as a waiter. (Dave Berry)

wangle (verb)
Manage to obtain (something) by persuading or cleverly manipulating someone. (OD)
To resort to trickery or devious methods.  To adjust or manipulate for personal or fraudulent ends.  To make or get by devious means; finagle. (MW)
To obtain, bring about or achieve by cleverness, persuasion, or deceit. (WN)

white elephant (noun)
A property requiring much care and expense and yielding little profit. (MW)
A possession that is useless or troublesome, especially one that is expensive to maintain or difficult to dispose of. (OD)

wifty (adjective)
Vague, imprecise.  Of thinking, argument, etc.:  Unclear; muddle-headed, scatterbrained; fuzzy.  Light-headed, muzzy, confused. (OD)
Eccentrically silly or scatterbrained; ditzy. (MW)
Ditzy, eccentric, flighty, unfocused, scatterbrained. (WN)

win-win negotiation (business practice)
Negotiations in which each party walks away from the bargaining table having achieved its goals within the confines of an integrative, or value-creating, bargaining process.  Win-win strategies are all about increasing your opponent’s satisfaction even as you achieve the outcome you desire. (Harvard Program on Negotiation)
Note:  Despite its omnipresence in our culture, I find this concept terribly naive; see Jim Camp's Start With No

woman (noun)
A human being whose 23rd pair of chromosomes (the sex chromosomes) are composed of two X chromosomes.  As chromosomes are located in the nucleus of each and every cell in the body, this chromosomal composition is immutable.  No amount of body mutilation or hormones (new or suppressed) will change the chromosomal makeup.  Thus if you are born female, you will remain female until the day you die. (RM)
Note:  How sad is it that today, this word needs to be defined?
See:  man

woolgathering (noun)
Indulgence in aimless thought or dreamy imagining; absentmindedness. (OD)

woolly (adjective)
Lacking in definiteness or incisiveness; muzzy.  Of the mind, etc.:  Confused and hazy.  Of painting, etc.:  Lacking in clearness or definition.  Of sound, etc.:  Dull and indistinct. (OED)

woolly-minded (adjective)
Vague or confused in character or expression. (OD)
woolly-mindedness (noun)
Also:  woolly-witted (adjective)

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V <=> X-Y