pulchritudinous adj.

"beauty, fairness," c. 1400, pulcritude, from Latin pulchritudo "beauty; excellence, attractiveness," from pulcher "beautiful," a word of unknown origin. De Vaan writes that Latin the -ch- spelling is by Greek influence and posits a stem *polkro- or *pelkro-, but that's as far as he confidently takes it.

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."