Unpinned refers to something that is not pinned down or fastened securely. Antonyms for the phrase "more unpinned" could be "more secured", "more fastened", "more anchored", "more fixed", or "more stable." These antonyms suggest a sense of stability and safety, indicating that something has been securely fastened or anchored. Using these antonyms can convey a sense of certainty and assurance, indicating that something is not likely to come loose or detach. These antonyms are especially useful in situations where safety or stability is a primary concern, such as construction, transportation, or equipment maintenance.