weighty Antonyms

weightless nugatory trifling trivial twiggy unfrequent unsignificant unsubstantial worthless tiny thin souffle ordinary paltry petty piddling pointless secondary slight small unimportant irrelevant laffer unserious very light wispy less important exceptionally light extremely light extremely lightweight having minimal weight featherlight noncritical Mickey Mouse ankle-deep anorectic underweight lightweight ludic Calais hairlike meaningless weighing very little negligible airy fibroid fiddling filamentary filamentous flippant