Abstruse (adj)
ab-stroos
Difficult to understand; obscure.
Late 16th century: from Latin abstrusus ‘put away, hidden’, from abstrudere ‘conceal’, from ab- ‘from’ + trudere ‘to push’.
Example sentences
“In all honesty it was an abstruse request anyway.”

Soigné (adj) swahn-yay Carefully or elegantly done, operated, or designed First recorded in 1915–20. Borrowed directly from French; originally from soin, meaning “care.” (more…)