Webster’s Revised Unabridged Dictionary · 1913
Stupid
Stu′pid (stū′pĭd), a. [L. stupidus, fr. stupere to be stupefied: cf. F. stupide.] 1. Very dull; insensible; senseless; wanting in understanding; heavy; sluggish; in a state of stupor; — said of persons.
O that men . . . should be so stupid grown . . . As to forsake the living God! Milton.
With wild surprise, A moment stupid, motionless he stood. Thomson.
2. Resulting from, or evincing, stupidity; formed without skill or genius; dull; heavy; — said of things.
Observe what loads of stupid rhymes Oppress us in corrupted times. Swift.
Syn. — Simple; insensible; sluggish; senseless; doltish; sottish; dull; heavy; clodpated. — Stu′pid·ly (#), adv. — Stu′pid·ness, n.