I'm afraid I can't give an authoritative answer to your question but I am reminded that the overlap in meaning between "want" and "need" is beautifully demonstrated in the Selkirk Grace (https://sco.wikipedia.org/wiki/The_Selkirk_Grace) by Robert Burns that comes out for inspection every Burns Night.
Some hae meat and canna eat,
And some wad eat that want it,
But we hae meat and we can eat,
Sae let the Lord be Thankit!
Which, as I imagine you would know (should you ever have pondered it), might be translated from Lallans Scots to a more familiar English dialect as
Some have meat and cannot eat
And some would eat ...
(in the sense of "want to eat" rather than this being a conditional statement)
... that want it
(in the sense of "lacking it", or "needing it")
But we have meat and we can eat
So let the Lord be thanked.
(presumably, third person singular imperative there!)
Interestingly, "want" appears in this poem in a setting in which it means "need", and the concept of "wanting" (in the sense of "desiring") appears in the form of the word "would", which is also making a guest appearance under a guise which is different to its more common usage.
Language---don't you just love it!
Thinking about it, I would love to see that poem translated into Gailge. I am afraid that is well beyond me.