The phrase "with strings attached" refers to any situation where there are conditions or limitations placed on something. Antonyms for this phrase include liberated, unencumbered, unconditional, free, and unfettered. When something is liberated or unencumbered, it means that it is free from any restrictive clauses, making it a more open and unrestricted option. Similarly, unconditional and unfettered mean that there are no conditions placed on something, allowing for more freedom and flexibility. Using these antonyms, we can better communicate the absence of restrictions and limitations, providing a more positive and optimistic message for any situation where strings would normally be attached.