decreasing
de-creas-ing
verb
Becoming smaller in amount, size, or intensity; reducing gradually.
"The noise was decreasing steadily."
adjective
Characterised by a reduction in size, quantity, or degree.
"We noted a decreasing number of sales."
Thesaurus
Synonyms: detractive, depreciatory, tapering, tapering off, depreciative, diminishing, falling, depreciating, dwindling, allargando, diminuendo, rit.
Antonyms: increasing