| verb | smother or suppress “Stifle your curiosity” |
| verb | make moist “The dew moistened the meadows” |
| verb | deaden (a sound or noise), especially by wrapping |
| verb | reduce the amplitude (of oscillations or waves) |
| verb | make vague or obscure or make (an image) less visible “muffle the message” |
| verb | check; keep in check (a fire) |
| verb | lessen in force or effect “soften a shock” |
| stifler | noun | a person who stifles or smothers or suppresses |
| moistener | noun | a device that dampens or moistens something |
| moisture | noun | wetness caused by water |
| moistening | noun | the act of making something slightly wet |
| dampener | noun | a device that dampens or moistens something |
| dampening | noun | the act of making something slightly wet |
| muffler | noun | a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations |
| mute | noun | a device used to soften the tone of a musical instrument |
| damper | noun | a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations |
| weakener | noun | that which weakens or causes a loss of strength |