How to say "Useless" in Japanese

When translating "useless" into Japanese, you must choose carefully between 無駄な and 徒爾. In Japanese, 無駄な (むだな (mudana)) is typically associated with "useless, wasteful, futile, in vain" (Syllabus Level: N4) and represents This is a な-adjective used to describe something that is without purpose, effectiveness, or value, often implying wastefulness of time, effort, or money. It can be used directly before a noun. On the other hand, 徒爾 (とじる (toji)) maps to "useless, futile, vain, fruitless, in vain" (Syllabus Level: N1) and represents Often used in formal contexts or writings to express that efforts or actions were pointless and yielded no results. It implies a strong sense of futility.. A literal translation of "useless" can often sound unnatural to native Japanese speakers if mixed up!