IPA: /ˈdiːpən/
KK: /ˈdipən/
To make something more deep or to increase its depth.
The artist decided to deepen the colors in her painting to make it more vibrant.
Past: deepened
Past Participle: deepened
Deepen → It is formed from "deep" (from Old English *deop*, meaning profound or intense) and "-en" (a suffix used to form verbs indicating to make or become). The word "deepen" means to make something deeper or to increase the depth of something.
Think of making something more 'profound' or 'intense' ('deep') — and the '-en' means to make it so. This helps you remember that 'deepen' means to make something deeper.