Simple past tense and past participle of unlimber.(verb)
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Use "unlimbered" in a sentence
"Having reached its destination, and been detached or "unlimbered" from the front carriage, we next see the action of loading; the ramrod having at its other extremity a sheep-skin mop, larger than the bore of the piece, and called "a sponge.""
"I unlimbered my lance and cast my stone down the smooth track."
"Loaded with streamlined 180 - or 200-grain bullets, these cartridges are not even getting unlimbered at 300 yards."