Secret or enigmatical language.
The science or study of mathematical, linguistic, and other coding patterns and histories.
The practice of analysing encoded messages, in order to decode them.
language, jargon, or terminology used uniquely in a particular environment or group.
Speech, conversation.
To communicate with one's voice, to say words out loud.
To understand (as though it were a language).
To have a conversation.
To utter.
To produce a sound; to sound.
To be able to communicate in a language.
Of a bird, to be able to vocally reproduce words or phrases from a human language.
To deliver a message to a group; to deliver a speech.
To be able to communicate in the manner of specialists in a field.
To communicate or converse by some means other than orally, such as writing or facial expressions.
To communicate (some fact or feeling); to bespeak, to indicate.