Question

sort words according to the meanings of their prefixes.

prefix means
again

prefix means
not

prefix means
before

reconstruct
recast
reaction
prehuman
prefight
trial
incomplete
indirect

Explanation:

• reconstruct: "re - " means again.
• recast: "re - " means again.
• reaction: "re - " means again.
• retrial: "re - " means again.
• incomplete: "in - " means not.
• indirect: "in - " means not.
• prefight: "pre - " means before.
• prehuman: "pre - " means before.

Answer:

• Prefix means again: reconstruct, recast, reaction, retrial.
• Prefix means not: incomplete, indirect.
• Prefix means before: prefight, prehuman.