词根：-jac-, -ject-, -jact-

【词根含义】：投,射

【词根来源】：来源于拉丁语动词jacio, jacere, jaci, jactus(投,射)。

【同源单词】：abject, adjective, conjecture, deject, dejected

前缀：pro-

【词根含义】：前;公开

【词根来源】：来源于希腊语和拉丁语pro。

【同源单词】：by-product, compromise, improvident, microprocessor, portrait

词根词缀：jet-, -ject, -jecting, -jected, -jection, -jector, -jectory; jacu-, jac-

【来源及含义】Latin: throw, send, fling, hurl, cast; gush; spurt

【同源单词】abject, abjection, abjectly, abjectness, adjectival, adjectival