to a distinctly greater extent or degree than is common
"he was particularly fussy about spelling"
"a particularly gruesome attack"
"under peculiarly tragic circumstances"
"an especially (or specially) cautious approach to the danger"
In a special manner; specially.
"The chef prepared that dish especially for our anniversary dinner."
In plain English: Especially means something is true for one specific person or thing more than anyone else.
"I love chocolate, especially when it is melted into a warm bowl."
Usage: Use especially to mean "particularly" or "above all," often to highlight one item within a list or group. Do not use it interchangeably with "specially," which implies something was done for a specific purpose.
The word especially comes from the combination of especial and the suffix -ly. It entered English to mean "in a special manner," emphasizing that something is more important or distinct than usual.