| Word | Definitions | Synonyms |
|---|---|---|
| deepen | (verb) become more intense | Synonyms: intensify |
| (verb) make more intense, stronger, or more marked | Synonyms: compound, heighten, intensify | |
| (verb) become deeper in tone | Synonyms: change | |
| (verb) make deeper | - | |
| steepen | (verb) make steeper | - |
| (verb) become steeper | - |