Read ___ (study)

• "It is incumbent ___ us to ..."
• ". . . ___ a midnight dreary"
• "... --- a midnight dreary"
• "___ Cripple Creek" (1969 hit for "The Band")
• Once __ a time
• Broadway's "Once ___ a Mattress"
• Surmounting
• At the time of

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
Old English upon ; see up (adv.) + on (prep.).

Wikipedia Word definitions in Wikipedia