IPA: /ˈdæmpən/
KK: /ˈdæmpən/
To become slightly wet or moist.
The rain began to dampen the ground.
Past: dampened
Past Participle: dampened
To make something less strong or intense, or to make it slightly wet.
The rain began to dampen the ground, making it muddy.
Past: dampened
Past Participle: dampened
Dampen → It is formed from "dam" (from Old English *dæm*, meaning to block or obstruct) and "-pen" (a suffix used to form verbs). The word "dampen" means to make something less intense or to block its force.
Think of 'blocking' ('dam') something to make it 'less intense' — that's what dampen means.