The process of translating an idea or thought into a message consisting of verbal, written, or nonverbal symbols, or some combination of them, is called decoding.

Decoding

The process of interpreting and understanding the meaning of messages received, particularly in the context of communication.

Nonverbal Symbols

Communication elements such as gestures, facial expressions, and body language that convey messages without using words.

Verbal

Relating to words or the use of speech in communication as opposed to non-verbal forms like gestures or facial expressions.