45. Pain. Travail. Labor. Weariness. The Words

The words κόπος, πόνος, and ὠδίν have similar meanings, but there are different ideas connected with them. ὠδίν occurs but four times in the N. T. It refers literally to the pangs of a woman in childbirth, in which sense it occurs in 1 Thess. 5:33For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape. (1 Thessalonians 5:3); twice it refers to the pangs that will seize the wicked when God's judgments are poured out upon the earth, Matt. 24:88All these are the beginning of sorrows. (Matthew 24:8); Mark 13:88For nation shall rise against nation, and kingdom against kingdom: and there shall be earthquakes in divers places, and there shall be famines and troubles: these are the beginnings of sorrows. (Mark 13:8); and once in reference to the pains of death endured by the Lord. Acts 2:2424Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it. (Acts 2:24).
μόχθος (from μογέω, 'to labor, be in distress') occurs three times in the N. T. It has been judged to refer to the toil which is the lot of man in this world of sin, answering to "in the sweat of thy face shalt thou eat bread." This seems to be confirmed by Paul's twice using it in reference to his labors (travail, A. V.), having to work night and day in addition to his apostolic work. 1 Thess. 2:99For ye remember, brethren, our labor and travail: for laboring night and day, because we would not be chargeable unto any of you, we preached unto you the gospel of God. (1 Thessalonians 2:9); 2 Thess. 3:88Neither did we eat any man's bread for nought; but wrought with labor and travail night and day, that we might not be chargeable to any of you: (2 Thessalonians 3:8). In 2 Cor. 11:2727In weariness and painfulness, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness. (2 Corinthians 11:27) it is joined with κόπος where Paul describes his life of labor and toil ("weariness [κό.] and painfulness [μό.]" A. V.), as well as the dangers he passed through.
κόπος (from κόπτω, 'to strike ') occurs often in the N. T. In the A. V. it is translated ‘weariness' in 2 Cor. 11:2727In weariness and painfulness, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness. (2 Corinthians 11:27); ‘trouble' and ‘labor' often. Perhaps the weariness of labor and trouble marks this word.
In the LXX three of the above words are attributed to Job's wife in her despair under the dealings of Satan. "The pangs (ὠδῖνες) and pains (πόνοι) of my womb which I bore in vain with sorrows (μόχθων)"—having lost her sons and daughters. Job 2:99Then said his wife unto him, Dost thou still retain thine integrity? curse God, and die. (Job 2:9).