The phrase "abandoned key" is correct and usable in written English.
It can be used to refer to a key that has been left behind or no longer in use, often implying it is no longer needed or wanted.
Example: "After searching the entire house, I finally found the abandoned key hidden under the couch."
Alternatives: "discarded key" or "unused key".
What is easier to predict, however, is that the IRSP will soldier on without much in the way of political support, just as all militant republican parties did prior to the green tide of Sinn Féin's electoral breakthrough after the 1981 hunger strikes, or the Workers' party's "political lobotomy", by which it abandoned key republican principles.
Conservative Catholics have a right to their opinions, but many of us in liberal Protestant churches would dispute their contention that we have abandoned key elements of Christian belief and practice.
The crunched up receipts, 6 pounds of change, and abandoned keys fighting in the bottom of the purse.
This prospect is what provides our strongest leverage to persuade the Iranian government to abandon key elements of its nuclear program.
Sometimes I thought of the Peace Corps as a reverse refugee organization, displacing all those lost Midwesterners, and it was probably the only government entity that taught Americans to abandon key national characteristics.
Attacked verbally by Iran and quietly criticized within his own government, Mr. Kouchner shifted the focus away from the threat of war and back to a call for hard negotiations as the way to force Iran to abandon key nuclear activities.
Cameron has been accused by critics of taking his eye off the domestic agenda in recent months and of running a government of U-turns, after abandoning key policies on schools and disability benefits, and changes of mind on issues such as child migrants.
Nato bombers flew too high to protect themselves and could not discriminate between bombing Serb civilians and bombing the Serb military; Nato did not abandon key bombing raids on passenger trains and refugee convoys when it realised the victims were civilians; The bomb attack on a television station - even one that was used for war propaganda purposes - was a war crime.
To rub home the need for urgent and sometimes unpopular decisions, Mr Blair also used a Guardian-sponsored debate to warn that the middle classes will abandon key public services - threatening to drive down standards in schools and hospitals - unless Labour persists with radical reforms of the way they function.
The efforts were pursued in the face of the New Haven's bankruptcy in 1961, moves to abandon key services in 1965 and the later complications of the Penn Central merger, its take‐over of the New Haven, and this year the bankruptcy of the Penn Central itself.
But the gap between them is so large that one, or both, would have to abandon key principles to reach a deal.
