When we say that something is done "humanly possible," we mean that it was done to the best of the abilities of a human being, without any potential superhuman interventions. Synonyms for the phrase include "as far as humanly possible," "within human limitations," "to the maximum of human capacity," and "as much as can be done by humans." These terms emphasize the efforts that a person has put into achieving a task, regardless of the potential risks or obstacles faced. They also underscore the notion that there are limits to what humans can accomplish, regardless of how hard they work.