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to put it bluntly stresses
gen.	грубо говоря (Kydex); откровенно говоря; если начистоту (4uzhoj); прямо говоря (dreamjam); откровенно говоря (used for telling someone that you are going to be honest even if this upsets them,: To put it bluntly, their demands are unreasonable.); если говорить без обиняков (to put it bluntly dreamjam)
inf.	попросту сказать; сказать по правде (VLZ_58)

to put it bluntly: 2 phrases in 1 subject

Informal

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