slackening (n.)
- abatement
- alleviation
- arrest
- assuagement
- attenuation
- attrition
- calming
- check
- deadening
- debilitation
- deceleration
- delay
- detention
- devitalization
- dilution
- diminution
- drag
- easing
- enervation
- enfeeblement
- evisceration
- exhaustion
- extenuation
- fatigue
- flagging
- holdup
- hushing
- inanition
- lag
- leniency
- lessening
- letdown
- letup
- lightening
- loosening
- mitigation
- modulation
- mollification
- obstruction
- pacification
- palliation
- reduction
- relaxation
- remission
- retardation
- setback
- slowdown
- slowing
- softening
- tempering
- thinning
- weakening
