explosive：爆炸(性)的，爆发(性)的

词根词缀：ex-出 + -plos-爆裂 + -ive形容词词尾

• fortunately
• fortune
• fortune cookie
• fortune-teller
• forty
• forum
• forward
• forwardness
• forwards
• fossick
• fossil
• foster
• foul
• found
• foundation
• founder
• foundling
• foundry
• fount
• fountain
• four
• four-letter word
• fowl
• fox
• foxed