What are the opposite words for negligible?

Negligible is a word that describes something of no consequence, unimportant, or insignificant. On the contrary, some antonyms for negligible are substantial, significant, considerable, or important. These are words that indicate the impact or magnitude of something. For instance, a significant change is a change that is noticeable, meaningful, or important. On the other hand, negligible change is insignificant or inconsequential. In conclusion, antonyms for negligible signify something that is not trivial, not of minimal importance, and not insignificant. Therefore, understanding antonyms for words helps to expand vocabulary usage, improve communication, and express ideas effectively.