Strong's #425: anesis (pronounced an'-es-is)
 from 447; relaxation or (figuratively) relief:--eased, liberty, rest.
Thayer's Greek Lexicon:
 ̓́ 
 
  anesis 
 
 1) a loosening, relaxing
 
 1a) spoken of a more tolerable condition in captivity, to be held in less vigorous confinement
 1b) relief, rest, from persecutions
 
  Part of Speech: noun feminine
Relation: from G447
  Citing in TDNT: 1:367, 60
 
Usage:
This word is used 5 times:
Acts 24:23: "Paul, and to let him have  liberty, and that he should forbid none of his"
2 Corinthians 2:13: "I had no  rest in my spirit, because I found not"
2 Corinthians 7:5: "flesh had no  rest, but we were troubled on every side;"
2 Corinthians 8:13: "I mean not that other men  be eased, and ye burdened:"
2 Thessalonians 1:7: "And to you who are troubled  rest with us, when the"