2 chiefly, mainly, predominantly, primarily, principally, first, firstly, first of all, above all:
He is especially interested in music.
Advanced English Dictionary
+adverb (abbreviation esp.) 1 more with one person, thing, etc. than with others, or more in particular circumstances than in others Synonym: PARTICULARLY The car is quite small, especially if you have children. + Teenagers are very fashion conscious, especially girls. + I love Rome, especially in the spring. 2 for a particular purpose, person, etc: I made it especially for you. 3 very much; to a particular degree: I wasn't feeling especially happy that day. + 'Do you like his novels?' 'Not especially.' WHICH WORD? especially / specially Especially usually means 'particularly': She loves all sports, especially swimming. + It is not placed first in a sentence: I especially like sweet things. Especially I like sweet things. Specially usually means 'for a particular purpose' and is often followed by a past participle, such as designed, developed or made: a course specially designed to meet your needs + She has her clothes specially made in Paris. In BrE, especially and specially are often used in the same way and it can be hard to hear the difference when people speak. Specially is less formal: I bought this especially/specially for you. + It is especially/specially important to remember this. The adjective for both especially and specially is usually special.
Random quote: We can only be said to be alive in those moments when our hearts are conscious of our treasures.: Thornton Wilder