词根词缀：-blem

【来源及含义】Greek: insertion; literally, "something thrown in"

【同源单词】emblem, problem, problematic, problematical, problematically, problematize

词根词缀：pro-, por-, pur-

【来源及含义】Greek > Latin: a prefix signifying before; forward, forth; for, in favor of; in front of; in place of, on behalf of; according to; as, to place before; to go before or forward, to throw forward

【相关词根词缀】 Related before-word units: ante-; antero-; anti-; pre-.

【同源单词】portend, portent, portentous, portentously, portentousness, pro

词根词缀：problem-

【来源及含义】Greek > Latin: literally, "something thrown forward, to throw forward"

【相关描述】"A difficult question proposed for solution", from Old French problème (14th century), from Latin problema, from Greek problema, "a problem, a question"; literally, "a thing put forward" from proballein, "propose" from pro, "forward" plus ballein, "to throw".

【同源单词】problem, problematic, problematical, problematically, problematize, problems