Verb

(undermin)

To dig underneath (something), to make a passage or for destructive or military purposes; to sap.

* 2009 , (Diarmaid MacCulloch), A History of Christianity , Penguin 2010, p. 312:

Martin, for instance, had on one occasion undermined a tree sacred to old gods, then stood in the path of its fall, but forced it to fall elsewhere by making the sign of the Cross.

(figuratively) To weaken or work against; to hinder, sabotage.

* {{quote-news, year=2012, date=April 19, author=Josh Halliday, work=the Guardian

, title= Free speech haven or lawless cesspool – can the internet be civilised? , passage=The growing use of social media to spread anger and dissent in the Arab world has been hailed by western governments as one of the chief justifications for a completely unfettered internet. The US is reportedly funding the secret rollout of technology in Iran in an effort to undermine internet censors in the country.}}

Verb

To provide an acceptable explanation for.

How can you justify spending so much money on clothes?

Paying too much for car insurance is not justified .

To be a good, acceptable reason for; warrant.

Nothing can justify your rude behaviour last night.

* E. Everett

Unless the oppression is so extreme as to justify' revolution, it would not ' justify the evil of breaking up a government.

To arrange (text) on a page or a computer screen such that the left and right ends of all lines within paragraphs are aligned.

The text will look better justified .

To absolve, and declare to be free of blame or sin

* Shakespeare

I cannot justify whom the law condemns.

* Bible, Acts xiii. 39

By him all that believe are justified' from all things, from which ye could not be ' justified by the law of Moses.

To prove; to ratify; to confirm.

(Shakespeare)