what does **for want of commitment** mean in the following sentence?

Question

what does for want of commitment mean in the following sentence? (emphasis added)

If the reports have not been successful, it is not for want of commitment by the Bank.

Yusuf, Shahid. 2009. Development Economics through the Decades : A Critical Look at 30 Years of the World Development Report. Washington, DC: World Bank. p 107.

Answer 1

It's a bit unfamiliar, right? It's true that, to many learners, want is always a verb (meaning something like "need" or "desire)", but in this sentence, want is a noun.

Let's get to the point, for want of something means:

for want of something
　　because someone lacks something
　　She could not make the trip for want of money.

If you look it up in another dictionary (the Oxford dictionary, definition 1, NOUN), you'll find this:

want [mass noun] A lack or deficiency of something:
'Victorian houses which are in want of repair'
'for want of a better location we ate our picnic in the cemetery'

To sum it up, it's as FumbleFingers wrote in his comment, it is not for want of commitment by the Bank means "it is not because the Bank lacks commitment".