とりわけ is an adverb meaning "especially", "above all": out of a group, one member stands out. It goes straight before the word or phrase it singles out, and the group is often named first.
、。
All the food in this region is good, but the fish is outstanding.
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She does well in many subjects, and excels in maths above all.
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All four seasons in Japan are beautiful, but the autumn leaves are especially fine.
The group can be left unsaid. Before an adjective, とりわけ then compares with how things usually are.
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This summer was especially hot.
とりわけ or 特に
means the same and is what you say in conversation. とりわけ belongs to writing, speeches and formal talk, and sounds stiff among friends.
is more literary still.
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I especially like the ramen at this place.
、。
Of all my teachers, I owe the most to Professor Yamada.