not under any circumstance(s)

not under any circumstance(s)

At no time; never; for no reason whatsoever. No child of mine is going to become a lawyer—not under any circumstances! A: "Would you ever consider joining one of our committees in the future?" B: "No, not under any circumstance." Fans are not allowed backstage under any circumstances!
See also: any, not
Farlex Dictionary of Idioms.

under any circumstances

Also, under no circumstances. See under the circumstances.
See also: any, circumstance
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • under any circumstances
  • not for all the tea in China
  • wouldn't do (something) for all the tea in China
  • wouldn't do something for all the tea in China
  • all the time in the world
  • with not a stitch of clothes (on)
  • not for the world
  • with not a stitch of clothing (on)
  • sad state of affairs, a