Verb
To make deep or deeper; to increase the depth of; to sink lower; as, to deepen a well or a channel.
To make darker or more intense; to darken; as, the event deepened the prevailing gloom.
To make more poignant or affecting; to increase in degree; as, to deepen grief or sorrow.
To make more grave or low in tone; as, to deepen the tones of an organ.
To become deeper; as, the water deepens at every cast of the lead; the plot deepens.
Source: Webster's dictionaryThe job of the artist is to deepen the mystery. Francis Bacon
My own experience and development deepen everyday my conviction that our moral progress may be measured by the degree in which we sympathize with individual suffering and individual joy. George Eliot
At the beginning of the new century, it is the common aspiration of the peoples of the two countries to deepen mutual understanding, enhance trust, develop friendship and strengthen cooperation. Li Peng
Writing and reading decrease our sense of isolation. They deepen and widen and expand our sense of life: they feed the soul. Anne Lamott
A great library easily begets affection, which may deepen into love. Augustine Birrell
Religion is a wizard, a sibyl. She faces the wreck of worlds, and prophesies restoration. She faces a sky blood-red with sunset colours that deepen into darkness, and prophesies dawn. She faces death, and prophesies life. Felix Adler