taper off

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Related to taper off: reinstate, regardless of, ameliorating
See: subside
References in periodicals archive ?
The researchers found that the chlorine level in the reservoir species was low throughout the period of greatest ozone loss in September, then returned to more normal levels in October when ozone depletion began to taper off.
In industrialized societies, cyring is as normal in a baby as diapers are on it: Crying generally peaks when the baby is around six weeks old, at which point the squalls taper off.