D defs.my
Entry 5 senses · 2 variants Webster, 1913

Deepen

/dēp'-ən/ · Deep·en · IPA /ˈdiːpən/
01 v. t. To make deep or deeper; to increase the depth of; to sink lower; as, to deepen a well or a channel.
imp. & p. p. Deepened; p. pr. & vb. n. Deepening
  1. 1.
    To make deep or deeper; to increase the depth of; to sink lower; as, to deepen a well or a channel.
    “It would . . . deepen the bed of the Tiber.” Addison.
  2. 2.
    To make darker or more intense; to darken; as, the event deepened the prevailing gloom.
    “You must deepen your colors.” — Peacham.
  3. 3.
    To make more poignant or affecting; to increase in degree; as, to deepen grief or sorrow.
  4. 4.
    To make more grave or low in tone; as, to deepen the tones of an organ.
    Deepens the murmur of the falling floods.” Pope.
02 v. i. To become deeper; as, the water deepens at every cast of the lead; the plot deepens.
  1. 1.
    To become deeper; as, the water deepens at every cast of the lead; the plot deepens.
    “His blood-red tresses deepening in the sun.” Byron.