deepen

Etymology

From deep + -en.

verb

1. (transitive) To make deep or deeper
   They deepened the well by 200 feet.
2. (transitive) To make darker or more intense; to darken
   The event deepened the prevailing gloom.
3. (transitive) To make more poignant or affecting; to increase in degree
   News of her death deepened my sorrow.
4. (transitive) To make lower in tone
   The tuner deepened the tone of the organ.
5. (transitive) To make more thorough or extensive.
   The class deepened my understanding of the subject.
6. (transitive) To make more intimate.
   The shared experiences deepened our relationship.
7. (transitive) To make more sound or heavy.
   The hypnotist then proceeded to deepen his trance.
8. (intransitive) To become deeper
   The water deepens as you go toward the middle of the channel.
9. (intransitive) To become darker or more intense
   The crisis deepened in the following weeks.
10. (intransitive) To become lower in tone
    His voice deepened with age.
11. (intransitive) To become more thorough or extensive.
    His skill in deciphering the texts deepened with practice.
12. (intransitive) To become more intimate.
    The conversation deepened and they began to truly share.
13. (intransitive) To become more sound or heavy.
    The new bed allowed my sleep to deepen.