前缀：ef-

【词根来源】：=ex-,用在f前。

【同源单词】：effect, effective, effectively, effectuate, efferent

前缀：e-, ef- 表示"出, 出来"

elongate 延长，拉长（e+long长＋ate→长出来）

elaborate 精工细做的（e+labor劳动＋ate→劳动出来→精做的）

eject 投出，掷出（e+ject掷→掷出）

emerge 浮现（e+merge投入；淹没→淹没的东西出现→浮现）

evade 逃出，逃避（e+vade走→走出去→逃避）

eradicate 根除，灭绝（e+radic根＋ate→把根挖出→根除）

effluence 流出（ef+flu流＋ence→流出）

前缀：ef- 出、离去

effluence 流出

effoliation 落叶

efflation 吹出，吹出之物

effable 能被说出的

词根词缀：ex-, e-, ef-

【来源及含义】Latin: a prefix occurring in words of Latin origin used in the senses: out, out of, from; upward; completely, entirely; to remove from, deprive of; without; former [said of previous holders of office or dignity]

【相关描述】Before f, ex- becomes ef-; before all voiced consonants (as b, d, g, etc.) ex- becomes e-.

【同源单词】e pluribus unum, educate, educe, efface, effacement, effete