deepen
v.to make something deeper or more intense. You can use it for physical things like a hole, or for feelings like love and understanding.
v.to increase the depth of something physically or to intensify a quality, emotion, or relationship.
“The workers need to deepen the well to find more water.”
“The two countries signed a new trade agreement to deepen their economic ties and cooperation.”
“As the investigation continued, the mystery began to deepen, revealing a complex web of secrets that the local authorities had ignored for decades.”
Can be used both transitively (to deepen something) and intransitively (something deepens).
Usage deepen our understanding · deepen their human
“The time to talk with teens is now, and these conversations can protect their safety and deepen their human connections.”
“Individual European countries have also deepened their own contacts with Kabul.”
From deep + -en.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.