1843, from stupor + -ous. Related: Stuporously; stuporousness.
Entries linking to stuporous
stupor n.
late 14c., from Latin stupor "insensibility, numbness, dullness," from stupere "be stunned" (see stupid).
-ous
word-forming element making adjectives from nouns, meaning "having, full of, having to do with, doing, inclined to," from Old French -ous, -eux, from Latin -osus (compare -ose (1)). In chemistry, "having a lower valence than forms expressed in -ic."