Each trio of words below contains a synonym, antonym, and anagram - in random order - of a fourth word. Can you determine the fourth word?

1)
Disagree
Eager
Correspond

2)
Delays
Sainted
Liberates

3)
Opts
Arrest
Start

4)
Fix
Rapier
Break

5)
Foe
Ally
Yemen

Answers:

1. Agree
2. Detains
3. Stop
4. Repair
5. Enemy