Noah Webster
Deepen
DEEPEN, verb transitive
1. To make deep or deeper; to sink lower; as, to deepen the channel of a river or harbor; to deepen a well.
2. To make dark or darker; to make more thick or gloomy; as, to deepen the shades of night; to deepen gloom.
3. To give a darker hue, or a stronger color; as, to deepen a color; to deepen a red, blue or crimson color.
4. To make more poignant or distressing; as, to deepen grief or sorrow.
5. To make more frightful; as, to deepen the horrors of the scene.
6. To make more sad or gloomy; as, to deepen the murmurs of the flood.
7. To make more grave; as, to deepen the tones of an organ.
DEEPEN, verb intransitive To become more deep; as, the water deepens at every cast of the lead.