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

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of loosen.

n. an occurrence of control or strength weakening

n. the act of making something less tight

"And of course atmospheric belt loosening is not possible; there is no extra space to put our carbon emissions."

tighten   

loosened    loosening    loosens   

change    modify    alter    disentangle    straighten out    unsnarl    weaken   

to loosen a cough    to loosen the bowels    lose   

unloosen    loose   

loosened    loosening    loosen the purse strings    loosen the apron strings    loosener   

tighten    weaken    rending    loosing    strengthen    submergence    mlength    lower    sundering    powder puff