Concentrate

Example: "The country's population is concentrated in major cities".

To bring or gather things together in one place or toward a common center. concentrate

To make a substance stronger or purer by removing liquids (like water) or impurities. Noun Example: "Frozen orange juice concentrate". Verb Example: "Boil the sauce to concentrate its flavors". Common Synonyms The best synonym depends on how you are using the word: Example: "The country's population is concentrated in major

Example: "I need to concentrate on my work to finish this report". or "pore over". For gathering: Accumulate

Focus, center, rivet, attend, or "pore over". For gathering: Accumulate, amass, congregate, or cluster.