This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Third-person singular simple present indicative form of unlimber.

"Now, Mr. Gilmour is an old friend of mine and he is not an alarmist over the ordinary goings-on in life, but when it comes to the forests he throws caution to the wind, unlimbers his superlatives and lets fly."

limber   

unlimbered    unlimbering    unlimbers