Isn't it like this "e" in "especial" makes the ordinary "special" even more "special"...?
This is just a question and I am definitely NOT a teacher.
By the way I highly invite and encourage ALL English language experts to correct me whenever they regard me being wrong, whether in spelling, grammar, lexical issues or whatever else regardless if it is a topic-related expression or a second-plan utterance, a serious mistake or a petty one. ALL revisions are extremely welcome and appreciated. Just to let you know.