say it: LOO-suh-ning
loosening is a noun meaning "an occurrence of control or strength weakening". It carries 2 recorded senses.
an occurrence of control or strength weakening
“the relaxation of requirements”
“the loosening of his grip”
“the slackening of the wind”
the act of making something less tight
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for loosening come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.