4. The method of claim 1 , wherein the first dictionary is a message thread dictionary that primarily contains words derived from prior message threads, including messages received by the message processing device.
1. A method for use in an electronic message processing device, the method comprising: generating a new message in response to a command, wherein the new message relates to a prior message; storing words found in the prior message in a first dictionary; receiving an input reflecting a character selection; identifying words from the first dictionary and a second dictionary based on the character selection; and outputting the identified words prioritized according to whether each output word is identified from the first dictionary or the second dictionary.