it is not for lack/want of trying

: to be deficient or missing

: to be short or have need of something

: to stand in need of : suffer from the absence or deficiency of

: the fact or state of being wanting or deficient

: something that is lacking or is needed

: to be needy or destitute

: to have or feel need

: to be necessary or needed

: deficiency, lack

: grave and extreme poverty that deprives one of the necessities of life

: something wanted : need, desire

: severely straining the powers of endurance