frankly adverb
​
1. honestly, sincerely, in truth, candidly, to tell you the truth, to be frank, to be frank with someone, to be honest 
2. openly, freely, directly, straight, plainly, bluntly, overtly, candidly, without reserve, straight from the shoulder 
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002