problem [ˈprɑbləm] n. 问题；疑难问题；习题；引起麻烦的人 adj. 成问题的；难处理的；关于社会问题的
problem: pro-在前 + -blem-扔 → 扔在前面 → 形成阻碍 → 难题，问题
problematic [ˌprɑbləˈmætɪk] adj. 成问题的，有疑问的，不确定的
problematic: problem 问题 + -atic 形容词后缀 → 成问题的
emblem [ˈembləm] n. 象征，标记；纹章，徽章；标记，典型；〈古〉寓意画 vt. 象征；用象征表示；用图案（符号）表示
emblem: em-进入 + -blem-扔 → 扔进去进行对比或比较 → 象征，标志
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.