english expressions: surely.- slowly but surely

surely  

1       adv   You use surely to emphasize that you think something should be true, and you would be surprised if it was not true.  
ADV with cl/group     (emphasis)    You're an intelligent woman, surely you realize by now that I'm helping you..., If I can accept this situation, surely you can.     

2       adv   If something will surely happen or is surely the case, it will definitely happen or is definitely the case.  
FORMAL   ADV with cl, ADV before v   (=certainly)  
He knew that under the surgeon's knife he would surely die..., He is an artist, just as surely as Rembrandt or any other first-rate portrait painter is one.     

3    If you say that something is happening slowly but surely, you mean that it is happening gradually but it is definitely happening.  
♦ slowly but surely             phrase   PHR with cl  
Slowly but surely she started to fall in love with him...     

English Collins Dictionary - English synonyms & Thesaurus 

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exp.

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!  crux

id.

At a point where you know you have to make a decisio...

he can dish it but he can't take it

click-and-mortar

give the chills

exp.

have a powerful impact on someone; impress; generat...

source: 

http://dictionary.reverso.net/english-cobuild/slowly%20but%20surely