Antonym: strengthen. Similar words: take note of, take notice of, speaker, weekend, wear, swear, weave, wear off. Meaning: ['wɪːkən] 
v. 1. lessen the strength of 2. become weaker 3. destroy property or hinder normal operations 4. reduce the level or intensity or size or scope of 5. lessen in force or effect.
v. 1. lessen the strength of 2. become weaker 3. destroy property or hinder normal operations 4. reduce the level or intensity or size or scope of 5. lessen in force or effect. 
Random good picture Not show
1. Nothing could weaken his resolve to continue.
2. They watched her gradually weaken as the disease progressed.
3. She felt her legs weaken.
4. Such policies weaken the resolve of potential troublemakers.
5. You must not agree to do it. Don't weaken.
6. You can weaken the tea by adding water.
7. The Bundesbank's seemingly impregnable position has begun to weaken.
8. The formerly robust economy has begun to weaken.
9. She did not weaken in her resolve.
10. The division of Germany had served to weaken the party.
11. Another defeat in parliament would seriously weaken the president's ability to govern.
12. We know that prolonged exposure to vibration can weaken aircraft components.
13. If left unchecked,[sentencedict.com/weaken.html] corrosion will eventually weaken the pipeline.
14. Remember that knots weaken line so avoid undue stress.
15. The soldiers' morale was beginning to weaken.
16. Would gay marriage weaken the standard variety?
17. This might also weaken solidarity between workers.
18. A woman should soften but not weaken a man. Sigmund Freud 
19. To struggle was only to weaken himself; he could not displace the weight or break the grip that held him down.
20. Their purpose was to weaken the closed shop and to outlaw secondary picketing.
21. Sending Galindo off with the national title might weaken the case for the United States.
22. For three hours until the sun began to weaken he watched the boy begging for water.
23. These neglected aspects weaken attempts to distribute land due to the very low levels of profit from the minifundia.
24. There was one caveat: he was not to enter into a merger or otherwise weaken the Roche family's control of the firm.
25. The voucher proposal has been adamantly opposed by teachers unions as a scheme that would weaken public schools.
26. Once the purely factual purpose of the system becomes assimilated, resistance to, and fear of,(sentencedict.com) constructive criticism should weaken.
27. Many observers pin the blame on the army, whose all-powerful generals are seeing their grip weaken.
28. The Government's commitment to a positive reform of the law will weaken in view of the apparent lack of consensus.
29. Such policies offer the rich some protection as they weaken the resolve of potential revolutionaries.
30. A majority of developing countries feared such standards would be used to block their exports and weaken economic growth.
More similar words: take note of, take notice of, speaker, weekend, wear, swear, weave, wear off, wear out, wealth, sweater, wealthy, peak, steak, break, speak, sneak, streak, break off, break up, break in, break out, speak up, speak for, break down, break away, so to speak, break into, to speak of, break through.