Similar words: deepen, deepening, go off the deep end, opened, ripened, sharpened, deep, deeply. Meaning: ['diːpən] 
adj. having accumulated or become more intense.
adj. having accumulated or become more intense. 
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1. The friendship between father and youth deepened.
2. The gloom deepened as the election results came in.
3. Warships were sent in as the crisis deepened.
4. His actions only deepened the rift between himself and the majority of Congress.
5. When Crevecoeur smiled, the creases in his face deepened.
6. Their gloom deepened as the election results came in.
7. His kiss deepened and became hungrier.
8. The shadows deepened toward late afternoon.
9. The idea only deepened his gloom.
10. Over the years, her love for him deepened.
11. Her voice has deepened and coarsened with the years.
12. His voice deepened as he relaxed.
13. The water deepened after the dam was built.
14. The harbour has been deepened to take bigger boats.
15. Dusk deepened into night.
16. The colour of the sky deepened as the sun went down.
17. Her worried frown deepened.
18. The water deepened gradually.
19. The mystery deepened when the police's only suspect was found murdered.
20. Her voice deepened when she came to these lines of the letter.
21. The new finds have deepened our knowledge of giant ape.
22. The boys' voices had cracked and deepened.
23. But soon his feelings for her deepened.
24. This deepened the mystery rather than clarifying it.
25. Their difficulty deepened when Cameron was sent off.
26. The experience supposedly deepened his already visceral anti-Semitism.http://sentencedict.com/deepened.html
27. Larger ships will be able to navigate the river after the main channel is deepened.
28. As the wave bore down on us, the trough deepened.
29. But why would anyone want to kill Jack? The mystery deepened .
30. As we drew nearer to it the water gradually deepened.
More similar words: deepen, deepening, go off the deep end, opened, ripened, sharpened, deep, deeply, deep-sea, deep red, deep down, deep fry, deep-set, deep-fry, pencil sharpener, deep south, knee-deep, neck-deep, deepness, keeper, weeper, beeper, deep water, deep-fried, deep space, teepee, sleeper, creeper, sweeper, steeper.