| v. t. | 1. | To make thick (in any sense of the word). |
| 2. | To render dense; to inspissate; | |
| 3. | To make close; to fill up interstices in; | |
| 4. | To strengthen; to confirm. | |
| 5. | To make more frequent; | |
| v. i. | 1. | To become thick. |
| Verb | 1. | thicken - make thick or thicker; "Thicken the sauce"; "inspissate the tar so that it becomes pitch" Synonyms: inspissate Antonyms: thin - make thin or thinner; "Thin the solution" |
| 2. | thicken - become thick or thicker; "The sauce thickened"; "The egg yolk will inspissate" Synonyms: inspissate Antonyms: thin - lose thickness; become thin or thinner | |
| 3. | thicken - make viscous or dense; "thicken the sauce by adding flour" Synonyms: inspissate |
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