Deep"en (?), v. t. [imp. & p. p. Deepened (?); p. pr. & vb. n. Deepening.]
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.
To make darker or more intense; to darken; as, the event deepened the prevailing gloom.
You must deepen your colors.
Peacham.
3.
To make more poignant or affecting; to increase in degree; as, to deepen grief or sorrow.
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.
© Webster 1913.
Deep"en, v. i.
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.
© Webster 1913.