General intelligence and cleverness:
* Умный (umnyy): This is the most common and general word for "smart." It refers to intellectual ability, quick wit, and understanding.
* Разумный (razumnyy): This word emphasizes rationality and sound judgment.
* Сообразительный (sobrazitel'nyy): This implies quick thinking and the ability to adapt to new situations.
Specific skills and expertise:
* Острый (ostryy): This means "sharp" and can be used for someone who is quick-witted and has a sharp mind.
* Талантливый (talantlivyy): This refers to someone who is gifted in a particular area, like art, music, or science.
* Компетентный (kompetentnyy): This emphasizes knowledge and expertise in a specific field.
Appearance and style:
* Стильный (stil'nyy): This describes someone who is fashionable and has good taste in clothing.
* Модный (modnyy): This means "trendy" and refers to someone who follows the latest fashion trends.
Other related words:
* Хитроумный (hitroumnyy): This means "cunning" or "shrewd."
* Мудрый (mudryy): This implies wisdom and experience.
Example sentences:
* Он очень умный человек. (On ochen' umnyy chelovek.) He is a very intelligent person.
* Она разумная женщина. (Ona razumnaya zhenshchina.) She is a rational woman.
* Он стильно одет. (On stil'no odet.) He is stylishly dressed.
The best word to use will depend on the specific context and nuance you want to convey.