weighty — OAT

weighty

adjective

1 a weighty tome of rules and regulations:

heavy, massive, thick, bulky, hefty, cumbersome, clumsy, ponderous, overweight.

▷antonyms light.

2 a weighty subject:

important, of great import/importance, significant, of significance, momentous, of moment, consequential, of consequence, far-reaching, key, major, vital, critical, crucial, life-and-death, high-priority, decisive, serious, grave, solemn;

no joke, no laughing matter.

▷antonyms unimportant, trivial.

3 it is a rather weighty responsibility to shoulder:

burdensome, onerous, heavy, oppressive, stressful, taxing, troublesome, worrisome, vexatious.

4 weighty arguments:

compelling, cogent, strong, forceful, powerful, potent, convincing, plausible, effective, efficacious, effectual, sound, valid, well founded, telling;

impressive, persuasive, influential, authoritative.

▷antonyms weak.