unusual; notable; exceptional: he paid especial attention to her that evening
2.
applying to one person or thing in particular; not general; specific; peculiar: he had an especial dislike of relatives
usage Especial and especially have a more limited use than special and specially. Special is always used in preference to especial when the sense is one of being out of the ordinary: a special lesson; he has been specially trained. Special is also used when something is referred to as being for a particular purpose: the word was specially underlined for you. Where an idea of pre-eminence or individuality is involved, either especial or special may be used: he is my especial (or special) friend; he is especially (or specially) good at his job. In informal English, however, special is usually preferred in all contexts
late 14c., from O.Fr. especial "pre-eminent, important," from L. specialis "belonging to a particular kind or species," from species "kind" (see species). Latin words with initial sp-, st-, sc- usually acquired an e- when borrowed by O.Fr. Modern French has restored the
word to spécial. Originally with the same sense as special, later restricted to feelings, qualities, etc.