A root reserved for a single object
When every occurrence of a root bears on the same object, that root is read as the proper term for that object. It has no other use in the Qur'an: its meaning is fixed by that object, and the translation renders it the same way each time.
The root حضض ("to urge") appears three times. All three times it is negated, and all three times it bears on the same thing: feeding the destitute.
"He did not believe in God, the Immense, nor did he urge the feeding of the destitute." (69:34)
"you do not urge one another to feed the destitute" (89:18)
"does not urge the feeding of the destitute" (107:3)
The Qur'an therefore never uses this verb for any other urging. The reproach is not only failing to feed: it is failing to push others to do it. Sura 89 says so with a reciprocal form: people do not urge one another.
In the text
وَلَا يَحُضُّ عَلَىٰ طَعَامِ ٱلْمِسْكِينِوَلَا تَحَٰٓضُّونَ عَلَىٰ طَعَامِ ٱلْمِسْكِينِوَلَا يَحُضُّ عَلَىٰ طَعَامِ ٱلْمِسْكِينِ