As an experienced construction worker, I might use a bare hacksaw blade and a chisel to remove the broken piece. However, a novice would be better advised to call a licensed plumber to get it right.
Weld a larger nut to what is left of the broken bolt, let it cool then turn it out.
"It is broken." Broken is an adjective. Broke is a verb, the past tense of to break.
Best to replace it
it is(un)breakable
With a extractor
Imbroken
You will need to buy a e-z-out. Drill a hole in the bolt put the e-z-out in and turn ccw. The e-z-out has left hand threads on it and it will back the bolt out.
Not formally. The word broke is the past tense of 'to break' and broken is the past participle used as an adjective (a broken switch).Broke is used colloquially as an adjective to mean "bankrupt" and in the aphorism "If it ain't broke, don't fix it."
Broke is a verb, the past tense of break and is used like this:The big boy broke his brothers toy. I broke my cell phone yesterday.Broken is also a verb, the past participle of break and is used like this:The boys have broken the window. Our team has broken the world record.Broken can also be an adjective:The toy is broken.
Depends how broken it is.
broken
infinitive: break past: broke past participle: broken