أَطْعِمُوا is an imperative meaning “provide food to others.” الطَّعَامَ means food. The command emphasizes meeting another person’s need in a tangible way. Feeding someone who is hungry is its direct example; hospitality and helping a neighbor in need express the same concern.
Suppose a household has enough food while a nearby person is going hungry. Instead of stopping at sympathetic words, people can share according to their ability while protecting the recipient’s dignity. Giving food while humiliating the person or repeatedly reminding them of one’s favor undermines the generosity being taught.