pro-

late 14c., probleme, "a difficult question proposed for discussion or solution; a riddle; a scientific topic for investigation," from Old French problème (14c.) and directly from Latin problema, from Greek problēma "a task, that which is proposed, a question;" also "anything projecting, headland, promontory; fence, barrier;" also "a problem in geometry," literally "thing put forward," from proballein "propose," from pro "forward" (from PIE root *per- (1) "forward") + ballein "to throw" (from PIE root *gwele- "to throw, reach").

The meaning "a difficulty" is mid-15c. Mathematical sense of "proposition requiring some operation to be performed" is from 1560s in English. Problem child, one in which problems of a personal or social character are manifested, is recorded by 1916. Phrase _______ problem in reference to a persistent and seemingly insoluble difficulty is attested from at least 1882, in Jewish problem. Response no problem "that is acceptable; that can be done without difficulty" is recorded from 1968.

late 14c., proceden, "to go, go on, move in a certain direction, go about one's business," also "to emanate from, result from; to issue or come, as from an origin or course," from Old French proceder (13c., Modern French procéder) and directly from Latin procedere (past participle processus) "go before, go forward, advance, make progress; come forward," from pro "forward" (from PIE root *per- (1) "forward") + cedere "to go" (from PIE root *ked- "to go, yield"). Related: Proceeded; proceeding.