(I) can't rightly say

(I) can't rightly say

I don't know with certainty. A: "How many people are coming to dinner tonight?" B: "I can't rightly say—my family tends to just show up without responding to invitations."
See also: rightly, say
Farlex Dictionary of Idioms.

(I) can't rightly say.

Rur. I do not know with any certainty. Fred: When do you think we'll get there? Bill: Can't rightly say. Bob: Okay, how does this look to you? Bill: I can't rightly say. I've never seen anything like it before.
See also: rightly, say
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • can't rightly say
  • rightly
  • can't say for sure
  • (I) can't say for sure
  • for certain
  • for sure
  • (I) can't say as I do(, can't say as I don't)
  • (I) can't say as I do
  • can't say as I do
  • (I) can't say's I do