Verb

(congregat)

(transitive): To collect into an assembly or assemblage; to assemble; to bring into one place, or into a united body; to gather together; to mass; to compact.

* Hooker,

Any multitude of Christian men congregated may be termed by the name of a church.

* Coleridge,

Cold congregates all bodies.

* Milton,

The great receptacle Of congregated waters he called Seas.

(intransitive): To come together; to assemble; to meet.

* ,

Even there where merchants most do congregate .

Verb

(concentrat)

(ambitransitive) To bring to, or direct toward, a common center; to unite more closely; to gather into one body, mass, or force.

to concentrate rays of light into a focus

to concentrate the attention

Let me concentrate !

To increase the strength and diminish the bulk of, as of a liquid or an ore; to intensify, by getting rid of useless material; to condense (qualifier, as opposed to 'dilute').

to concentrate acid by evaporation

to concentrate by washing

To approach or meet in a common center; to consolidate.

Population tends to concentrate in cities.

* {{quote-book, year=2006, author=

, title=Internal Combustion , chapter=2 citation , passage=Buried within the Mediterranean littoral are some seventy to ninety million tons of slag from ancient smelting, about a third of it concentrated in Iberia. This ceaseless industrial fueling caused the deforestation of an estimated fifty to seventy million acres of woodlands.}}

To focus one's thought or attention (on).