Dried up and Uncommunicative

Uncommunicative and dried up are semantically related in taciturn topic. In some cases you can use "Uncommunicative" instead an adjective "Dried up", when it comes to topics like secretive.

Uncommunicative adjective - Deliberately refraining from speech.

Dried up and uncommunicative are semantically related in shy topic. Sometimes you can use "Dried up" instead an adjective "Uncommunicative".