قاموس اللغة الإنجليزية

To make thick (in any sense of the word).

To render dense; to inspissate; as, to thicken paint.

To make close; to fill up interstices in; as, to thicken cloth; to thicken ranks of trees or men.

To strengthen; to confirm.

To make more frequent; as, to thicken blows.

To become thick.