to suddenly stop talking because of shyness or fear
вдруг перестать говорить из-за застенчивости или страха (vdrug perestat' govorit' iz-za zastenchivosti ili strakha)
"He clammed up with embarrassment when everyone stared at him."
"Он замолчал от смущения, когда все на него смотрели." (On zamochnal ot smushcheniya, kogda vse na nego smotreli)
to maintain contact or communication with someone over time
to freely express and share positive emotions
to search for something you need
to release built-up stress or tension
to take measures to defend from threats or attacks
to reveal something secret or hidden; to show what you feel