Finding suitable synonyms for the word "untrappable" can be a challenging task, but there are a few alternatives that can effectively convey a similar meaning. One option is "uncapturable", which denotes the inability to be captured or trapped. Additionally, "inaccessible" emphasizes the difficulty of trapping something or someone. "Ungrippable" suggests an object or entity that cannot be firmly grasped or caught. Another synonymous term, "escape-proof", describes a situation where escape or capture is virtually impossible. Lastly, "free" can portray the lack of entrapment, implying a state of liberty or unboundedness. By utilizing any of these alternatives, one can convey the concept of "untrappable" in diverse contexts and texts.