under any circumstances

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:
  • not under any circumstance(s)
  • 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
References in classic literature
Oldfield, she has given him to understand that I have refused his offer, not from any dislike of his person, but merely because I am giddy and young, and cannot at present reconcile myself to the thoughts of marriage under any circumstances: but by next season, she has no doubt, I shall have more sense, and hopes my girlish fancies will be worn away.
The Tenant of Wildfell Hall
By contrast a total of just 42% said abortion should be legal "under any circumstances" (29%) or legal "in most circumstances" (13%).
NRLC President Tobias provides deeper meaning of new Gallup Poll on abortion
Wade ruling gave sweeping constitutional protection to abortion -- asks Americans to say whether they believe abortion should be "legal under any circumstances," "legal only under certain circumstances," or "illegal in all circumstances." The current analysis is based on Gallup trends grouped into six time periods between 1975 and 2009.
Typically, majorities of both sexes have said abortion should be "legal only under certain circumstances." Smaller percentages have believed it should be either legal under any circumstances or illegal in all circumstances -- with those in favor of legality consistently the larger group.
Women have in recent years been more likely than men to hold the two absolute positions on abortion -- saying it should be either legal under any circumstances or illegal in all circumstances -- but these differences are not large.
Education Trumps Gender in Predicting Support for Abortion; College-educated adults -- and especially college-educated women -- most supportive
(32) The plan must not give the administrative committee the power to reduce the exercise price under any circumstances, except for the usual pro-rata adjustments of option amounts and exercise prices in the case of recapitalizatious or mergers.
Deferred compensation for executives under sec. 409A
According to Advocate-General Poiares Maduro, a group relief scheme which does not allow a parent company to deduct the losses of its subsidiaries established abroad under any circumstances is incompatible with Community law.
Marks & Spencer: EU claims for cross-border loss relief
The question was, "Do you think abortion should be legal under any circumstances, legal only certain circumstances, or illegal in all circumstances?" As the chart above demonstrates, 22% said legal under any circumstances, 61% said legal under some circumstances, while 15% said abortion should be illegal in all circumstances.
Majorities continue to believe that abortion should be legal only under limited circumstances, although the 1973 Supreme Court abortion decisions legalized abortion under any circumstances.
Opposition to Abortion Is Strong and Growing
A CPA has no privilege under any circumstances, but an attorney may have a privilege in connection with consultation and representation, if the information conveyed to him is conveyed in the setting described above and is not waived by the client.
Privilege and confidentiality: confusing principles