The word "un-resisting" refers to something or someone who does not resist or oppose anything. The antonyms for this word would be resisting, opposing, challenging, fighting or struggling. These words indicate some kind of objection or opposition to any given situation. When something is described as resisting, it is struggling against something that is trying to change it. Similarly, opposing means to hold an opposing view or to fight against something that is happening. In contrast, un-resisting means that there is no pushback, no struggle, and no objection. It implies a state of complete acquiescence or surrender.